Hi.
A few years ago, I installed 2 DC Windows 2003 STD, 1 EXCH 2007 and other servers at our customer.
On ADS, I configured 2 domain: something.local and something.it.
Now, I would add other domain anythingelse.com (required from Microsoft Support to migrate to Office365) already configured on Exchange 2007 as Domain accept (there are 20 mailbox).
If I add new domain via dcpromo, there may well be problem with mailbox xxx@anythingelse.com?
Thank you very much