The estos UCServer needs an unequivocal address for every user for presence and Chat, the so-called "identity". The identity is composed from the username and the presence domain.
A presence domain is uniquely and permanently assigned to a estos UCServer. The estos UCServer is thus responsible for transmitting the presence information of all its users.
Ideally, the identity of each user should match their email address.
The presence domain can be exclusively changed via the server setup, i.e. by a new installation, upgrade or update. Please note that by updating the presence domain all user profiles on the server are customized. Similarly, Setup will try to update all of the favorites and monitor content of workplace software to the changed user identities. After the upgrade, you will be prompted to check the user profiles, especially the user identities.
Version 7.3.1.5073