We have a hybrid and federated office 365 setup. We've taken advantage of the offering for Alumni accounts for Office 365 which I've read in a Technet bog covers us for the CAL needed to access the On-premise Exchange server. However because we have a federated setup the Alumni accounts all need AD accounts to work in this way.
Do I need to purchase seperate Windows Server CALs for the Alumni or is this not needed?
If I do I guess I would be better off unfederationg the alumni domain and just having accounts and passwords controlled by Microsoft and not through our Active Directory?
Hope that makes sense :)