Hi Kyle,
To troubleshoot the issue, I’d like to confirm the following information with you:
Do all the accounts you create in the new DirSync/FullSQL occur the same issue?
I also suggest you check whether all the attributes include “msExch” from the following link are empty in the local AD:
http://support.microsoft.com/default.aspx?scid=kb%3ben-US%3b2256198
Thanks,
Jason Jiang