Difference in generated primary email between primary domain and other domains

L.S.,

I've got a brand new Kolab 16 installation on Ubuntu 18.04. It's gtoing 
to be a multi domain setup. For now I just added a second domain to 
Kolab, using webadmin. What surprises me is that if I add a new user to 
the primary domain, the genrated primary email is <first name>.<last 
name>@<domain>.nl, which I actually like. If I add a new user to any 
other domain (which is a domain on the same level, so it is not an alias 
domain), the primary email is <last name>@<domain>.nl (and one of the 
aliases is <first name>.<last name>@<domain>.nl). Is there any way to 
change that?

Cheers,

Tom

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Tom Reijnders
TOR Informatica
Chopinlaan 27
5242HM Rosmalen
Tel: 073 5226191
Fax: 073 5226196