I have a few questions regarding our move to Active directory 2008 from Active Directory 2003:
1. Can we introduce 2008 and 2008 R2 domain controllers into the domain and keep the functional level at 2003 until we're ready?
2. Is it ok to have a mix of 2003, 2008 and 2008R2 domain controllers? (we plan to move them all over eventually to at least 2008)
3. Are there any major 'gotchas' I should look out for in this upgrade? The main servers that we have that rely on Active Directory are SQL 2005/2008 servers and Exchange 2003.
Thanks a lot!