We have ubunto 16.04 , we could join Domain using centrify express .
When I went to gdm windows , users could authenticate correctly .but some usernames appeared as numbers not names.
Example;
after joining the domain , I went to gdm windows to let users authenticate
username : john
Password : xxxxxxx
John could authenticate ,but his name appeared as 6400 ,and saved his home directory with 6400
Kindly advice