I am in the finalizing our Exchange 2010 setup and recently setup a new 64-bit server to run ADM+'s 64-bit version (the 32-bit version would only create legacy mailboxes within Exchange 2010).  With this all 64-bit setup, if I go to create an account with an Exchange 2007 mailbox, ADM+ will only create a legacy mailbox.  I noticed in the help docs the following noted limitation:

Does this mean that I need to run two seperate servers (like I have setup now with a 32-bit and a 64-bit version), or is there some other trick to get ADM+ to create mailboxes in 2007 and 2010 from one server?  My 32-bit OS/32-bit ADM+ setup, running 5.1.5101 creates Ex07 mailboxes, but not Ex10.  The 64-bit OS/64-bit ADM+ setup, running 5.1.5101 creates Ex10 mailboxes, but not Ex07.