Error FYI-2214 "Internal users cannot be added to Sharing Settings."
Issue
When adding a user to the New Collaborate Sharing Settings window, the following error is displayed:
Internal users cannot be added to Sharing Settings. Please add external guest emails only. To manage internal user access, refer to the selected Microsoft Group within the Collaborate App.
Cause
The email address, or one of the emails if entering multiple addresses, has been identified as an internal user. This means the user access is controlled through the selected Microsoft Group in the New Collaborate App settings in FYI, and not through the Sharing Settings on the client.
Solution
To find which Microsoft Group has been selected, navigate to Automation - Apps and select the Collaborate App. The Microsoft Group will be displayed.
To confirm the user has been added to this Microsoft Group, refer to your IT Administrator.