The chat capacity is defined in the configuration.
Users can be assigned to only one Chat configuration at a time. If you assign the same user to a second Chat configuration, the system removes that user from the first Chat configuration without warning you.
If
a user is assigned a configuration at the profile and user levels, the
user-level configuration overrides the configuration that’s assigned to
the profile.
a user is assigned a configuration at the profile and user levels, the
user-level configuration overrides the configuration that’s assigned to
the profile.