I'm running an Exchange 2010 server that I would like to move to Office 365. Currently I have 4 servers in the domain.
1. Server 2008 running terminal services
2. Server 2008R2 domain controller
3. Server 2008R2 running Exchange 2010
4. Server 2003 domain controller (being decommissioned)
My goal is to move Exchange to the cloud so I can have a second 2008R2 domain controller and retire the 2003 server.
From reading different guides it looks like I should go the hybrid route. There are less than 100 mailboxes, but I want to have DirSync so I'll be setting it up anyways. Between ADFS and DirSync, will I need to add another server, or can they be run on the same server even if it's a domain controller?