Error

Error #0071: the domain user (XXX) is not registered on the server

 

Error description

You are trying to connect to MyChat Server as a domain user that does not exist on the server.

 

Problem solution

Check in Admin Panel "Users", "User list" the following:

 

1.a user with such login and domain is registered on MyChat Server;

2.in this user account properties the authorization type must be specified as "Active Directory" or "Active Directory transparent authorization".