Set up Single Sign-On (SSO) on your WordPress website via the Office 365 Identity Provider (IDP) with the WordPress OAuth & OpenID Connect Single Sign-On plugin. Implementing Microsoft 365 SSO allows users to log into your websites and applications with a single set of credentials using the enterprise-level Office 365 OAuth provider.

Office 365, or Microsoft 365, acts as the OAuth Provider and WordPress acts as the OAuth Client. WordPress Office 365 Authentication provides smooth login between these two, removing the need to remember usernames and passwords.

The Microsoft Office 365 OAuth WordPress plugin also provides advanced SSO features like user profile attribute mapping, role mapping, and Azure multi-tenant login and provides site access based on organization email domains. You can also protect your complete WordPress site behind SSO. Microsoft Office 365 WordPress OAuth SSO plugin secures the user’s login process and improves user authentication authority. Follow the steps in the guide below to install this plugin.

Prerequisites: Download and Installation

• Log into your WordPress instance as an admin.
• Go to the WordPress Dashboard -> Plugins and click on Add New.
• Search for a WordPress OAuth Single Sign-On (SSO) plugin and click on Install Now.
• Once installed click on Activate.

Steps to configure Office 365 Single Sign-On (SSO) Login into WordPress

1. Setup Office 365 as OAuth Provider

• Sign in to Azure portal.
• Click on App Services and go to Manage Azure Active Directory.

• In the left-hand navigation pane, click the App registrations service, and click New registration.

• When the Create page appears, enter your application's registration information.(Refer to the below table)

Name :	Name of your application.
Application type :	Select "Web app / API" for client applications and resource/API applications that are installed on a secure server. This setting is used for OAuth confidential web clients and public user-agent-based clients. The same application can also expose both a client and resource/API.
Sign-on URL :	For "Web app / API" applications, provide the base URL of your app. eg, https://<domain-name> might be the URL for a web app running on your local machine. Users would use this URL to sign in to a web client application.

• When finished, click Register.

• A unique Application ID is assigned to your application by Azure AD. Keep the Application ID and the Directory ID handy, they will become your Client ID and Tenant ID, which will be needed later to configure the miniOrange OAuth Client plugin.

• Go to API permissions from the left navigaton pane and click on Add permissions. Then select Office 365.

• Select permissions and click on Add Permissions button.

• Go to Certificates and Secrets from the left navigaton pane and click on New Client Secret. Enter description and expiration time and click on ADD option.

• Copy the secret key "value" and keep the value handy it will be required later to configure Client Secret under the miniOrange OAuth Client Plugin.

You have successfully configured Office 365 OAuth Provider in order to provide authentication and authorization for the end users with Office 365 Single Sign-On (SSO) into WordPress with a single set of credentials. This solution ensures improved security & user experience.

2. Setup WordPress as OAuth Client

3. User Attribute Mapping

• User Attribute Mapping is mandatory for enabling users to successfully login into WordPress. We will be setting up user profile attributes for WordPress using below settings.

Finding user attributes

• Go to Configure OAuth tab. Scroll down and click on Test Configuration.

• You will see all the values returned by your OAuth Provider to WordPress in a table. If you don't see value for First Name, Last Name, Email or Username, make the required settings in your OAuth Provider to return this information.
• Once you see all the values in Test Configuration, go to Attribute / Role Mapping tab, you will get the list of attributes in a Username dropdown.

4. Office 365 Group Mapping

• Go to Application → Select the application where you want to configure the group mapping. Now, Go to the API Permissions tab.

• Click on the Add permission button, and then Microsoft Graph API -> Delegated Permissions and select openid, Profile scope and click on the Add Permissions button.

• Click on the Grant consent for Demo button.
• Go to Manifest tab and find groupMembershipClaims and changes it’s value to "All" and click on the save button.

• Now you would be able to get the group's value in the Test configuration window.

• You can follow the role mapping section to map the groups to WordPress users while Azure B2C SSO <link>.

5: Role & Group Mapping [Premium]

• Click on “Test Configuration” and you will get the list of Attribute Names and Attribute Values that are sent by your OAuth provider.
• From the Test Configuration window, map the Attribute Names in the Attribute Mapping section of the plugin. Refer to the screenshot for more details.

• Enable Role Mapping: To enable Role Mapping, you need to map Group Name Attribute. Select the attribute name from the list of attributes which returns the roles from your provider application.
  Eg: Groups


• Assign WordPress role to the Provider role: Based on your provider application, you can allocate the WordPress role to your provider roles. It can be a student, teacher, administrator or any other depending on your application. Add the provider roles under Group Attribute Value and assign the required WordPress role in front of it under WordPress Role.
  
  For example, in the below image. Teacher has been assigned the role of Administrator & Student is assigned the role of Subscriber.

• Once you save the mapping, the provider role will be assigned the WordPress administrator role after SSO.
  Example: As per the given example, Users with role ‘teacher’ will be added as Administrator in WordPress and ‘student’ will be added as Subscriber.

6. Sign In Settings

• The settings in Single Sign-On (SSO) Settings tab define the user experience for Single Sign-On (SSO). To add a Office 365 login widget on your WordPress page, you need to follow the below steps.

Sign in settings for WordPress 5.7 and before

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.


Sign in settings for WordPress 5.8

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.

• Open your WordPress page and you can see the Office 365 SSO login button there. You can test the Office 365 Single Sign-On (SSO) now.

Sign in settings for WordPress 5.9

• Make sure the "Show on login page" option is enabled for your application. (Refer to the below image)

• Now, go to your WordPress Login page. (Eg. https://< your-wordpress-domain >/wp-login.php)
• You will see an Office 365 SSO login button there. Once you click the login button, you will be able to test the Office 365 Single Sign-On (SSO).