Groups User Caps (Saas) Should Not Restrict New Guest Users
If a group is using User caps for groups and has hit the user cap limit, then new users cannot be added to the group.
This includes inviting Guest users on an Ultimate subscription.
In this issue, we will change that behavior to allow inviting a new Guest user to the group even if the group is at or over the user cap limit.
This is similar behavior to the change for Self-Managed User Caps that was completed in #361563.
See note here: #361563 (comment 1763416727)
Documentation Update Required: The documentation here needs to be updated when this is behavior is changed. The following text will no longer be accurate:
On GitLab.com, on the Ultimate tier, there is a known issue where you cannot add new guest users to a group when the amount of billable users exceeds the user cap. For example, suppose you have a user cap of 5, with 3 developers and 2 guests. After you add 2 more developers, you cannot add any more users, even if they are guest users that don’t consume a billable seat.
See the relevant MR that added this to the documentation here: Fix Erroneous Documentation About Groups User Cap (!144109 - merged)