Hi, we want to update from SCCM 2012 R2 SP1 to sccm 2012 R2 SP1 CU1.

We have a CAS and 4 primaries. We were wondering if there's any contra indiction in installing it 1st on the CAS, then doing the other primaries a few hours afterward separate by 3-4hours each.

So we'd start at 1AM for the CAS, 1st primary at 4-5AM, second primary 8-9AM, third primary 1-2PM and the last one at 4-5PM .

I don't think there's any problem with that, but we wanted to be sure before going forward.

Thks in advance and don't hesitate if you have any questions.

No problem. The most important part is to start at the top of the hierarchy.

No problem.

... *if* all services and - even more important - DRS replication is fully up and running agin.