About Partner Authentication for SFDC Communities
Single sign-on to Service Board is supported for customer partners. Partners of ServiceMax customers who are members of new or existing Salesforce communities can be granted access through their community authentication credentials. You can also configure an external OAuth2 provider for partner communities.
After you create and configure a Salesforce community and assign the appropriate profiles for community members, you create partner user accounts with these profiles You then configure an external OAuth provider if needed and create a Salesforce Visualforce page and Visualforce tab.
For more information:
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