I'm in the process of migrating from Exchange 2003 to 2007 SP1 and only have one Exchange 2003 server left.
In the "How to Remove the Last Legacy Exchange Server from an Organization" Tech Net Article (http://technet.microsoft.com/en-us/library/bb288905(EXCHG.80).aspx
) they mention moving the mapi public folder hierarchy.
That article and MS Q252105 article seems to treat the mapi hiearchy move as rather minor step where nothing can go wrong.
However, I have seen references mentioning that there can only be one mapi hiearchy in an exchange organization and I see at least issue on this site where someone had a "There are multiple MAPI public trees found." problem.
My preference is to move the mapi hiearchy and make sure things are working, then a few days later finish the retirement of the Exchange 2003 server.
My questions are:
1. Am I ending up with one mapi hiearchy after I drag the public folders from the Exchange 2003 administrative group over to the new 2007 administrative group or am going to have two and need to retire the last Exchange 2003 server right away?
2. If the mapi hiearchy move fails, is it merely a Authortative Active Directory restore situation to roll back or am I looking at Exchange restore situation also?