Exchange in Separate forest from Login domain

[jfp23]

Our parent company wants us to migrate our AD to their forest. We use Exchange and they don't so the intention is to keep our Exchange server in its existing forest, the reason for that is they use a different naming standard then we do for logging in and we don't want to disrupt the exchange logins. My question is if we do this is there a way to still have single sign on when users open outlook so they don't have to use a different username and password for exchange then for the windows login? possibably through the use of domain trusts.

 

[snella]

Sounds like you will be setting up a resource Forest, have a read at the following Microsoft article:

http://technet.microsoft.com/en-us/library/aa997312(EXCHG.65).aspx

You basically create a trust between both forests, disable you mailbox accounts in the Exchange Forest and add the user accounts from the user forrest as assiciated external accounts.

 

[jfp23]

If we go this route can the AD accounts on forest have different User IDs then the accounts in the Resource forest?