I am using AD bindings but in the setting “LDAP/AD Group and Class Query” you can define what attribute is used to compare username. In my case (and also the standard case I guess) this is defined as:
DC=home,DC=intern?memberOf,objectClass?sub?(sAMAccountName={USERNAME})
Here you can simply change “sAMAccountName” to whatever you want the username to be queried from.
I have not researched permission definition deeply but I guess with “LDAP/AD Group permission mapping” you should be able to give particular LDAP groups the permission to use Urbackup features. As there is no documentation available I am unsure about possible rights here. I am using “all” right for Domain Admins in my case.
Hope that helps!
Bye