Reached maximum container members per user limit for one of the users. The current configured limit is %1. The last user ...

Reached maximum container members per user limit for one of the users.

The current configured limit is %1. The last user who reached this limit is %2.
Cause: A user has reached the configured limit for maximum container members.
Resolution:
Container member limit is controlled by the maximum number of contact limit setting. Please use server management tools to change the limit. Increasing the limit to a high value might have performance implications.