Need some advice from someone who has come across this before. I have a client that will be migrating to Office 365. They currently have 2 office locations (physical) and will be adding a third soon. Currently running a Windows 2008 domain controller at the main office. There is a 10MB metro link between the 2 physical locations. That allows users to authenticate currently between buildings.
Client will be installing a cable internet line (or fiber) into the second building and the third office buildings - so each location will have it's own internet connection.
I want to keep the main Win2008 DC in place with Active Directory. My question is since they are moving to Office365 and sharepoint - they will essentially be moving all of their data into the cloud. Most of their apps are web based anyway.
Now I know with Office365 they can login anywhere and use Office - they will use their current credentials with the AD that syncs up to the cloud
Do I need to install a DC at the other 2 locations, create a VPN link between all three to have the DC's sync/replicate with AD?? Or do I combine MS Azure with the current physical onsite DC and manage the user accounts that way? or not sure Azure at all and just let the Windows AD server sync with Office 365 and the users at any office (or home location) can still be managed?
Hope that makes sense and that I gave enough information.
thank you very much for your help