Hello @fbartels ,
sorry comeing back so late on that issue. I just had some time to test it out. It works nicely. 
As the scripting is a nice little project for one of our apprentices, I’d like to ask if we can create a non-active kopano user via commandline in the ucs ldap store?
The creation of the required transportmap entry via command line is described here and works very well.
Best greets,
Mario Minati