OAuth 2.0 is being deprecated in the System Console and replaced by OpenID Connect. Using the System Console, you can migrate your OAuth configuration to the OpenID Connect standard.
A one-time, one-click conversion tool is available within the existing OAuth 2.0 page. You can also go to System Console > Authentication > OpenID Connect.
Select Convert to OpenID Connect to migrate your active service provider configuration to the new standard. No further changes are required.
Inactive service providers configured for OAuth 2.0 are also migrated to the new OpenID Connect standard. Converting to OpenID Connect removes the OAuth 2.0 option from the System Console menu.
For details on configuring Mattermost to use a service provider as a Single Sign-on (SSO) service for team creation, account creation, and user sign-in OpenID Connect, refer to the following documentation: