Where can I change the default Out of Office language on Exchange server 2007?

Where can I change the default Out of Office language on Exchange server 2007?
Since I migrated all users from E2K3 to E2K7 SP1, the out of office subject line changed from English to Dutch for some users.
I cannot find any reasen or setting why this is so.
Does anyone know?
Thanks a lot!
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aeitsupportAuthor Commented:
aeitsupportAuthor Commented:
Never mind, found the solution allready

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Can you please provide the soultion? Im having the same problem...
aeitsupportAuthor Commented:
In my case, it had to do with the language provided in the mail users.  Users from the exch 5.5 server had dutch mailboxes, users from the 2003 server had english mailboxes.  Every user created in 5.5 had the issue.  I needed to change a msexchange attribute of the user through adsi edit, but I cannot remember exactly which attrib.
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