Overview:

Engage Meeting Administration Reports an error: There was an error with this request. {0} of 1 records were updated. Please try again.  This occurs when trying to Save a Group:

Root Cause:

This error means that a duplicate username exists in the Engage Meeting License Database for the user or users that are being allocated.

This may occur if a Sandbox is recently refreshed and new licenses are provisioned to the org instead of re-linking from the old org ID to new org ID.

Solution: