An error is displayed when adding a new user to an Anti-Spam group in the Clientnet portal.
Cannot process this save as the domain would exceed the maximum allowed Users.
There are 2 limits to consider when managing Anti-Spam groups. The maximum number of groups per domain is limited to 20. The maximum number of users within these groups is limited to 150 across all groups, per domain.
Symantec Email Security.Cloud
The current limit is being reviewed by our development team for a potential future increase, but no release date is currently available.