Windows Exchange 2013 problemen

[NBS]

Forum,

Currently i am working on a test environment with microsoft exchange 2013 and server 2012.
My network consist of 1 AD which runs the domain parka18.com, and a Microsoft Exchange 2013 server.
Besides that one AD i also have 6 AD's which runs the subdomains, one of them is A18callcenter.parka18.com
When i try to make a mailbox for an user in the domain parka18.com, everything works fine.
When i try to make a mailbox in the subdomain a18callcenter.parka18.com, i can see the user in the list of users, i select the user and when i click on "ok" I get an error.




This is the error that i get. (i can't post any pictures untill my account is verified)

I made sure that the subdomains are visible in the domain, that the trust relations are active and that the exchange server can ping all the other servers. i read somewhere on the internet about authorative domains, so i added them, but that didn't work aswell.

I hope someone can help me with my problem.
Thank you in advance,


P.S. Het is een Engelse post omdat ik het gekopieerd heb vanaf mijn Technet forum post.

[Question Mark]

Tja, alleen tweakers is een Nederlandstalig forum. Engelstalige posts zijn dus niet wenselijk, daarom gaat dit topic ook op slot.

Je mag gerust een (nieuw) topic over je probleem aanmaken, maar dan wel graag in het Nederlands.