Oauth2 certificate based authentication. Dec 21, 2023 · In this article.

0 endpoints to authorize access to Google APIs. Select Identity in the left-hand navigation, then select App registrations under Applications. 2. So, basically two step process from what I have understood so far -. My findings. This specification and its extensions are being developed within the IETF OAuth Working Group. Security scenarios differ between authorization code running server-side and client-side in Blazor apps. Register App in Entra ID with Certificate Authentication. This means customers can migrate from an unsecure Basic Authentication flow on OData to a secure certificate (not oAuth) based flow for the SCIM rest APIs (not OData anymore). May 2, 2019 · Upload the . In the dialog that opens, browse to the self-signed certificate (. The redirect and support URLs are not real, but we will be able to follow the example through anyway. Give the same password that you used for generating the certificate. For the default grant type client credentials-based authentication, following are the required Jan 29, 2014 · For a REST API against which clients would be writing non-browser based, non-interactive applications, if OAuth2 is the authentication mechanism to be followed, then we would use the client credentials grant type for the authentication. This grant type uses a combination of Mutual SSL and Application level credentials. 0 Authentication. Resources - List you mentioned, your service principal needs the RBAC role in your subscription. Jun 21, 2024 · See RFC 6750, bearer tokens to access OAuth 2. It defines how an API client can obtain security tokens that express a set of permissions against the resources fronted by that API. The tokens are attached by the client to its API messages to serve as Oct 9, 2020 · So I'm currently developing a Spring boot MS that needs to connect to an external API which has OAuth 2. Username & Password: The client passes a user name and password to the VEDAuth server. May 26, 2024 · This page provides an overview of authentication. This form of authentication is one of multiple ways you can authenticate in the Azure SDK for Java. Jul 7, 2021 · Goal I want to authenticate my daemon application with a certificate instead of client secret against Microsoft Graph &amp; want understand the exact request necessary to successfully authenticate. Microsoft Graph is a protected web API for accessing data in Microsoft cloud services like Microsoft Entra ID and Microsoft 365. Designed to work specifically with Hypertext Transfer Protocol (HTTP), OAuth separates the role of the client from the resource owner. OAuth lets you store its tokens for a year or more while OAuth 2. See RFC 7616. Authentication configuration is added in Startup. However, we will be using the OAuth2 web flow to authenticate ourselves. To send requests to an API that uses mutual TLS authentication, add your client certificate to Postman. . 0 access and refresh tokens. I am trying to use a Client certificate instead of a Client secret for creating OAuth 2. Apps can also request new ID and access tokens for previously authenticated Aug 22, 2022 · The OAuth2 authentication protocol is a more robust and reliable protocol than the OAuth1 method. For Dataverse, the identity provider is Microsoft Entra ID. You must configure the client to generate a client secret, use code grant flow, and support the same OAuth scopes that the load balancer uses. Private Key JWT is a method of client authentication where the client creates and signs a JWT using its own private key. We recommend that all new applications use the OAuth standard to connect to Exchange Online services. Enter the Host domain for the certificate (don't include the protocol). During the life of the token, users then access the website or app that the token has been issued for, rather than having to re-enter credentials each time they go back to the same webpage Double-click the SSL Settings option in the Features View window. Check the Require SSL checkbox, and select the Require radio button in the Client certificates section. This interface is used with SSL client certificate authentication and web view-based authentication, such as SAML and OAuth2. pfx certificate file. We will also be talking about the Genius API. In the Business Central client, search for Microsoft Entra applications and open the page. Below are the steps to generate a self-signed certificate using Jun 11, 2021 · An assertion (a JSON web token) that you need to create and sign with the certificate you registered as credentials for your application. In this walk-through I show how to use a certificate to request an access token to Azure Active Directory, using the OAuth 2. Select Configure to set up authentication binding and username binding. It is assumed that a cluster-independent service manages normal users in the following ways: an administrator distributing private keys a user store like Keystone or Google Accounts a file with a list of usernames Jul 15, 2023 · Adding client certificates. On the application page that opens, select Certificates & secrets from the Manage section. If you require another source for certificates, you can create a custom implementation of the CertificateProvider. 0 focuses on authorization and is not prescriptive about authentication. The session's role-based access control (RBAC) is configured using the directory role May 22, 2024 · The Azure SDK for Python provides classes that support token-based authentication. A token-based architecture relies on the fact that all services receive a token as proof that the application is allowed to call the service. Here are two examples how to obtain access token, one for Microsoft Graph and the other one for Google APIs. OAuth clients are provided a mechanism for authentication to the authorization server using mutual TLS, based on either self-signed certificates or public key infrastructure (PKI). csproj: [code language="csharp"] <Project Sdk="Microsoft. The Host field supports pattern matching. Certificate-based authentication (instead of using a client-secret) can be used in the context of Application Permissions over Azure AD. 0 is the industry-standard protocol for authorization. Client Credentials. May 11, 2024 · Conclusion. Clients can then gain access to that resource by presenting a SAS token, which consists of the resource URI being accessed and an expiry signed with the configured key. note: While we take some time to rest up over the holidays and prepare for next year, we are re-publishing our top ten posts for the year. OIDC also standardizes areas that OAuth 2. The application object provisioned inside Microsoft Entra ID has a Directory Role assigned to it, which is returned in the access token. Generate the Client Credentials. Legacy Application Flow. Included in the SDK is the SystemCertificateProvider for getting the certificate from the system. Create a client using the grant type of "authorization_code". For the record, however, there are also some disadvantages that you should be aware of. Implementing OAuth2 PKI Certificate-Based Authentication in Spring Boot Apart from HTTP basic authentication OAuth 2. 0 stands as a cornerstone of securing REST APIs in today's interconnected world. For example, enter postman-echo. The API Store uses a custom version of a grant type called a Client Certificate. 0 Security Profile. Obtain an OAuth Bearer Token. 0 specification defines a delegation protocol that is useful for conveying authorization decisions across a network of web-enabled applications and APIs. To authenticate using a Microsoft work or school account, use the Microsoft Authentication Library (MSAL). Similar to the method shown above, the OAuth2 authentication uses access tokens. The standard OAuth solution is Client Credentials flow, where clients each send a secret to the server. See RFC 7486, Section 3, HTTP Origin-Bound Authentication, digital-signature-based. The following sections describe each of these authentication methods in more detail. OAuth is unrelated to OATH, which is a reference architecture for authentication, not a standard for authorization. Default. Mobile Application Flow. A client application can use the refresh token to automatically refresh the access token. The idea here is this: Instead of having your user send their actual credentials to your server on every single request (like they would with Basic Auth, where a user Feb 5, 2024 · OpenID Connect is an extension of OAuth2 that adds an identity layer to the authorization framework. This article provides an overview of the Microsoft Custom authentication tokens. The advantage in security over basic authentication is worth the additional work required to implement OAuth in your application. To start with authentication using OAuth 2. Because this a PATCH call, which by protocol replaces the contents of the property with the new values, including only the new certificate will replace the Jun 25, 2024 · Workload identities are similar to user identities, but usually they require different authentication methods, such as keys or certificates. 0 overview The Aad authentication kind is a specialized version of OAuth for Microsoft Entra ID. 0 is not an authentication protocol. Mar 8, 2021 · I was exploring the possibility of getting the auth token in bash using certificate authentication. Firefox 93 and later support the SHA-256 algorithm. 0 authentication with the following grant types: Client Credentials . behalf of a resource owner by orchestrating an approval interaction. This new approach uses AzureAD applications, certificates and Modern Authentication. cer file) that you created in Step 3. OpenID Connect. 0 also supports authentication with a JWT, which doesn't expose the client credentials with the token request, has expiration, and thus provides stronger security. JWT Certificate Credentials . self_signed_tls_auth. May 9, 2024 · Authentication. Azure and custom web proxies. 0 is the industry protocol for authorization. Mar 26, 2024 · Better security. For more information, see Amazon Cognito user pools in the Amazon Cognito Developer Guide. See RFC 8120. It implements the authorization code flow. Once authentication has been setup, the user can be accessed in a gRPC service methods via the ServerCallContext. It is an XML-based open-standard for transferring identity data between two parties: an identity provider (IdP) and a service provider (SP). The protection level attribute has a default value of Single-factor authentication. Trust Protection Platform Authentication Server setting. If you allow Azure AD to present the authentication experience via OAuth 2. Jan 12, 2024 · Using OAuth token-based authentication. OAuth authentication. Integrated MS Windows Authentication: Default. 1. 0 protocol which should be considered obsolete. Social Media Login (e. OAuth is a service that is complementary to and distinct from OpenID. As such, it is designed primarily as a means of granting access to a set of resources, for example, remote APIs or user data. This approach safeguards sensitive user data, empowers users with control over their privacy, and streamlines the Jun 3, 2024 · Task 2: Set up the Microsoft Entra application in Business Central. 0 offers access tokens with a short-lived expiration date. Click on Import. To call the Azure REST API e. Open Advanced -> Certificates -> View Certificates -> Authorities. OAuth requires an identity provider for authentication. 0 is an authorization protocol and NOT an authentication protocol. In Postman, click Generate Code and then in Generate Code Snippets dialog you can select a different coding language, including C# (RestSharp). 0 authorization code flow acquire an access_token to include in requests to resources protected by the Microsoft identity platform (typically APIs). 0 client credentials user for their user account using the Oracle Cloud Infrastructure Console. Currently, the most popular protocol for obtaining these tokens is Dec 22, 2022 · The complete guide to protecting your APIs with OAuth2 (part 1) OAuth2 is one of the most popular specifications for API authentication today, though wrapping your head around it can be a challenge. SAML Bearer Assertion. Apr 7, 2023 · The certificate you specify in the Configure Claims-Based Authentication Wizard is used by AD FS to encrypt security tokens issued to the Dynamics 365 Server client. Mar 25, 2024 · The OAuth 2. OpenID Connect (OIDC) is an authentication standard built on top of OAuth 2. On the Certificates & secrets page, select Upload certificate. OAuth authorization servers are OAuth 2. 0 with EWS managed Mutual authentication. As part of the framework, a user explicitly grants the application access to their service account. Locate the Baeldung tutorials folder and its subfolder spring-security-x509/keystore. Applies to: Oracle Workflow - Version 12. Customers who currently use Exchange Online PowerShell cmdlets in unattended scripts should switch to adopt this new feature. Select the rootCA. gRPC offers a set of simple APIs to integrate OAuth 2. 0 is an updated version of the older OAuth 1. Users in Kubernetes All Kubernetes clusters have two categories of users: service accounts managed by Kubernetes, and normal users. 1) Last updated on NOVEMBER 19, 2023. Using either Salesforce Setup or API, admins can upload unique PEM-encoded X. Jun 21, 2024 · Under Manage, select Authentication methods > Certificate-based Authentication. Although it supports key-based authentication, its endpoint requires OAuth2, it is possible to get a token and authenticate yourself by passing the key in the headers object. It defines an ID token type to pair with OAuth 2. 0 , we would like to generate the access token (to be used in subsequent Azure API calls) via the client certificate stored in Azure key vault. One form of credential that an application can use for authentication is a JSON Web Token (JWT Oct 21, 2020 · The APIs can then authorize requests based on the client identity, provided in the access token. 3 days ago · OAuth is an open-standard framework for API authorization. An Access Token is a piece of data that represents the authorization to access resources on behalf of the end-user. The client requests access to the resources controlled by the May 22, 2021 · I have implemented Oauth 2. OpenID Connect (OIDC) adds a standards-based authentication layer on top of Dec 12, 2022 · With OAuth 2. Negotiate / NTLM. Below are some examples, along with simplified pseudo-code snippets: 1. SAS authentication in Service Bus involves the configuration of a cryptographic key with associated rights on a Service Bus resource. There are two mTLS-based methods that you can use to authenticate your OAuth client with the Cloudentity: tls_auth. Password authentication is the easiest choice for remote connections. Mutual. May 24, 2021 · The GitHub API supports OAuth2 authentication as well. All the other options require some kind of external security infrastructure (usually an authentication server or a certificate authority for issuing SSL certificates), or are platform-specific. 0 on-behalf-of authentication flow flow is used when an application invokes a service or web API that in turn needs to call another service or web API. third-party application to obtain access on its own behalf. I generate a dotnet console app on the command line, and then fire up Visual Studio Code: You need ADAL so throw that into SignedJWT. Digest. 0 authentication process. Apps using the OAuth 2. See the host and deploy documentation for how to configure the certificate forwarding middleware. Table 1. 0 client credential flow. Jun 30, 2020 · In this article, we introduced the new, certificate-based authentication for ExO PowerShell. Jun 4, 2024 · My company uses PingFederate server for implementing Oauth2 token A&A and we also use PKI certificate-based authentication for which the server is configured. Now customers can use new SCIM APIs (not OData) with a certificate-based approach. Oct 11, 2023 · To get an Access Token using Certificate Based Authentication using Postman with Azure AD App registration, you can follow these steps: 1. In the context of Delegated Permissions over Azure AD (not on-premises), it is not possible to authenticate with the Graph API using a Certificate, instead a client-secret has to be used. Connect to key vault to fetch the certificate. Refresh Token/Auth Code. This is needed for 3-legged OAuth, however it is not currently supported. In this flow, the SuccessFactors HCM Suite system will need the public key (the certificate) and the client application will have the private key. 0 focuses on client developer simplicity while providing specific authorization flows for web applications, desktop applications, mobile phones, and living room devices. For example, you can control the expired time of the client_assertion you generated flexibly. These refresh tokens offer better security and reduce Oct 26, 2023 · Teams PowerShell Module fetches the app-based token using the application ID, tenant ID and certificate thumbprint. Nov 28, 2017 · I have followed this document and was able to send the certificate (as shown in postman console). For authorization code that runs on the server, authorization checks are able to enforce access rules for areas of the app and Feb 1, 2024 · Open a browser and navigate to the Microsoft Entra admin center and login using a Work or School Account. 0 specification. 0 allows users to share specific data with an application while keeping their usernames, passwords, and other information private. The CRMAppPool account of each Dynamics 365 Customer Engagement (on-premises) web application must have read permission to the private key of the encryption certificate. The form parameters are then: Code Snippet: From the response body you can then obtain your access token. The token request parameters are form-encoded: grant_type Set to authorization_code. S. com to send requests to the Postman Echo API. 0 is an industry standard for “delegated authorization” which is the ability to provide an application or client access to data or features offered by another app or service. Previous versions only support MD5 hashing (not recommended). 0 is the preferred API authorization protocol. 0 on Office 365’s SharePoint Online platform, the first step is to create Jun 4, 2024 · Scalability: OAuth2 PKI certificate-based authentication can be easily scaled to support a large number of users. General Services Administration Office of Government-wide Policy Identity Assurance and Trusted Access Division, the Office of Personnel Management, and the Department of Education developed this guide to help Identity, Credential, and Access Management (ICAM) program managers and Microsoft Entra ID administrators implement Certificate-based Authentication with Microsoft Entra ID. <PropertyGroup>. Sep 10, 2023 · OAuth 2. The Microsoft identity platform allows an application to use its own credentials for authentication anywhere a client secret could be used, for example, in the OAuth 2. 0-protected resources. Application Gateway supports certificate-based mutual authentication where you can upload a trusted client CA certificate (s) to the Application Gateway, and the gateway will use that certificate to authenticate the client sending a request to the gateway. between the resource owner and the HTTP service, or by allowing the. So here is the problem. Also, you should only need the access token URL. , Facebook Login): Many websites and apps allow users to log in or sign up using their social media accounts. In the application settings section, add a new setting with Name WEBSITE_LOAD_CERTIFICATES and the thumbprint as the Value. Choose “ Trust this CA to identify websites” and click OK. The specific type of token-based authentication an app uses to authenticate to Azure resources depends on where Apr 8, 2024 · Client applications can use the metadata to discover the URLs to use for authentication and the authentication service's public signing keys. 3. In addition to authentication methods like single sign-on, Salesforce provides certificate-based authentication, which you can configure to authenticate your Salesforce users with unique certificates. On the Register an application page, set the values as follows. So, I need to find a way to get valid access token for service/daemon application to use with EWS managed API. 0 uses Access Tokens. Register an application with Azure AD and create a service principal. OAuth clients are provided a mechanism for authentication to the authorization server using mutual TLS, based on either self-signed certificates or public key Mar 1, 2024 · This article describes ASP. These permissions often reflect the consent of the user that owns those resources. See RFC4599 The Open Authorization (OAuth) 2. 0 or OpenID Connect, then you are insulated from the specific authentication method being employed. However, OAuth is directly related to OpenID Connect (OIDC), since OIDC is an authentication layer built on top of OAuth 2. Create a user pool client. Steps to use service principal to auth: 1. The first-party authentication must be working for this flow to work. 4 to 12. Both scripts are similar: create jwt payload/claims. 509 digital certificates to authenticate individual users to your org. It enables websites or applications to obtain limited access to user accounts using OAuth tokens. Secondly, the OAuth protocol works by authenticating users via tokens. Oct 26, 2017 · Based on my understanding, the only difference between them is that certificate credential provides a higher level of assurance. With the rise in IoT use cases and increased security requirements Sep 8, 2023 · Mutual-TLS (mTLS) means that not only the server (in our case, the authorization server) must have its certificate, but also any client that wants to be authenticated must possess its own certificate. More information can be found in the Configuring Microsoft Entra for a custom connector quickstart guide. By delegating user authentication and leveraging access tokens with granular scopes, it fosters a robust authorization model. sign header +payload with private key of the certificate uploaded to Microsoft/Google. The following articles describe other ways: Azure authentication in development environments; Authenticating applications hosted in Azure; Authentication with User Credentials Any user can create an OAuth 2. Sdk">. 0, you first retrieve an access token for the API, then use that token to authenticate future requests. OAuth 2 and OpenID Connect Authentication¶ The requests-oauthlib library also handles OAuth 2, the authentication mechanism underpinning OpenID Connect. OAuth authorization servers are . NET. Browser-based authentication. Jun 23, 2020 · Token-based Authentication Using OAuth 2. 0 into applications, streamlining authentication. 2. NET Core's support for the configuration and management of security in Blazor apps. If required (and supported by your Authorization Server) you can use a Mutual TLS form of Client Credentials, via the Client Assertion Profile. Workload identities don't use MFA. OAuth clients are provided a mechanism for authentication to the authorization server using mutual TLS, based on either self-signed certificates or public key OAuth 2. First, as clearly indicated in OAuth authentication. The following documentation may be of assistance: Nov 19, 2023 · EBS Workflow Mailer Configuration with OAuth 2. 0 client credentials grant flow and the on-behalf-of (OBO) flow. The token is issued by a third party that can be trusted by both the application and service. 0 Token-Based Authentication for Cloud-Based Email Services (Gmail, Yahoo, Office365, etc) (Doc ID 2650084. Oct 5, 2023 · OAuth is implemented in numerous real-world scenarios to enable secure access to resources. 0 authorization between the client and the API Mar 27, 2024 · Implementation. The certificate is now shown in the Certificates section. code The code obtained from step 1. OAuth is used in a wide variety of applications, including providing mechanisms for user authentication. Generate a self-signed certificate and upload it to the Azure AD app registration. Next, instead of using client secret for oAuth2. 0 Azure API Authentication by creating a token with Client Secret. Go to the Application settings section in your web app. Question/Issue. A full authentication protocol will probably also tell you a number of attributes about this user Sep 7, 2023 · This article covered authentication via service principal. 0 implemented. 0 is an authorization framework or protocol that lets an application get limited access to another service on behalf of a user. Apps can seamlessly authenticate to Azure resources whether the app is in local development, deployed to Azure, or deployed to an on-premises server. Could you please guide me on how to use the Client certificate to get a token? C# Code needed for implementing same. application to obtain limited access to an HTTP service, either on. In server side i look for ssl_client_cert header name to check if it is a certificate based authentication (as i have other modes of authentication too). Since Node-RED 1. It's protected by the Microsoft identity platform, which uses OAuth access tokens to verify that an app is authorized to call Microsoft Graph. 0 leaves up to choice, such as scopes, endpoint discovery, and the dynamic registration of clients. Jul 4, 2024 · Type about:preferences in the address bar. Select New. Read about certificate credentials to learn how to register your certificate and the format of the assertion. This document describes OAuth client authentication and certificate-bound access and refresh tokens using mutual Transport Layer Security (TLS) authentication with X. 1. Recommended for POST Authorize/OAuth. Jul 10, 2024 · This document explains how applications installed on devices like phones, tablets, and computers use Google's OAuth 2. X. 4 days ago · The authentication mechanism your app uses during a call needs to be configured. ConfigureServices and will be different depending upon the authentication mechanism your app uses. 0 authorization code flow is described in section 4. To configure OAuth client credentials, follow these main steps: Gather Needed Information. In some circumstances you may need to use your own authentication tokens and not use those generated by Node-RED. Complete these steps to set up the Microsoft Entra application for service-to-service authentication in Business Central. These access tokens are special kinds of data, often in the form of JSON, that allow users to authenticate for a site or a particular resource. Dec 12, 2023 · OAuth enables two-factor authentication (2FA) or certificate-based authentication for server-to-server application scenarios. 509 certificates. Oct 7, 2021 · SAML stands for Security Assertion Markup Language. OAuth 2. It requires two identity factors: The OAuth 2. Get values for signing in and create a new application secret. When you're finished, select Add. The idea is to propagate the delegated user identity and permissions through the request chain. This method is described in a combination of RFC 7521 (Assertion Framework) and RFC 7523 (JWT Profile for Client Authentication, and referenced by OpenID Connect and FAPI 2. HOBA. Authentication libraries are the most common consumers of the OpenID configuration document, which they use for discovery of authentication URLs, the provider's public signing keys, and other service Jan 14, 2016 · The OAuth protocol supports several different types of authentication and authorization (4 to be precise). Token-based authentication is a protocol which allows users to verify their identity, and in return receive a unique access token. In many customer environments, OAuth 2. Create a user pool. Authentication in the context of a user accessing an application tells an application who the current user is and whether or not they're present. You can configure shared access policies on 11. 0 Protocol is the industry-standard protocol for authorization. We have a java Spring Boot Reactive web API that is configured to authenticate via Oauth2 tokens. Jul 21, 2016 · 132. crt file and click OK. Sep 8, 2023 · If your app has an existing valid certificate that you want to continue using for authentication, include both the current and new certificate details in the app's keyCredentials object. Jan 13, 2021 · All this works good. Select New registration. Dec 21, 2023 · In this article. g. 0 authorization framework enables a third-party. Azure Active Directory connector supports OAuth2. 2] In this article. Microsoft has spent a great deal of effort and introduced quite few workarounds to make this possible. Using the new method “feels” much the same, as almost all cmdlets are available and behave in a similar fashion to what you are used to. Select Add Certificate. For example: You want to use OAuth based user authentication, but you also require automated access to the admin API which cannot perform the interactive authentication steps OAuth May 30, 2024 · Time to read: 8 minutes. See the requests-oauthlib OAuth2 documentation for details of the various OAuth 2 credential management flows: Web Application Flow. 3 and later Oracle E-Business Suite Technology Stack - Version 12. Instead, workload identities usually require other security controls, such as regular key-rolling and certificate expiration. The U. The client passes Windows credentials to the VEDAuth server. [Ed. This allows a client to verify the identity of the user and obtain basic profile information Feb 13, 2019 · Let's keep the token stuff as simple as possible. It uses the same Microsoft Entra ID client as the built-in Power Query connectors that support organizational account authentication. Feb 18, 2015 · In that case, more information may be necessary to authenticate the user than you are collecting, a one time password for instance. Select Multifactor authentication to change the default value to MFA. By the way, OAuth 2. Jun 22, 2021 · OAuth 2. Create an Azure AD App registration in Microsoft entra id. Access tokens are typically short-lived, but the authorization server can also provide a long-lived refresh token. Nov 15, 2023 · API authentication and authorization in API Management involve securing the end-to-end communication of client apps to the API Management gateway and through to backend APIs. Jun 29, 2022 · For a higher level of assurance, the Microsoft Identity Platform also allows the calling service to authenticate using a certificate or federated credential instead of a shared secret. Copy the thumbprint to clipboard. The following article shows an example of using OAuth 2. 0. Identity Provider — Performs authentication and passes the user's identity and authorization level to the service provider. 4 [Release 12. 509 Certificate: The certificate corresponding to the private and public key used in the OAuth 2. Jun 30, 2020 · As previously announced, Basic Authentication for Exchange Online Remote PowerShell will be retired in the second half of 2021. It allows a user to grant limited access to its protected resources. The OAuth 2. 0 token. 1 of the OAuth 2. Backend This document describes OAuth client authentication and certificate-bound access and refresh tokens using mutual Transport Layer Security (TLS) authentication with X. As the Remember to clean up the OAUTH metadata, as described in the Deleting OAUTH Metadata section. This has led many developers and API providers to incorrectly conclude that Apr 8, 2024 · The OAuth 2. Jul 12, 2019 · Now EWS client uses Basic authentication that, according to Microsoft, will become unsupported in EWS to access Exchange Online. Flexibility: OAuth2 PKI certificate-based authentication can be used with a variety of client applications, including web, mobile, and desktop applications. API Management supports OAuth 2. az aj wz br bh ue mz dk lb nd