Hi A Data Centre in one of our sites will experience a power down this weekend - apart from the BU servers, Citrix, etc we need to power down and then up the AD and Exchange 2007 servers too. We have: 2 x GC 2 x DC 1 x Exchange 2007 CCR CMS (i.e. one Active / one Passive) 2 x Hub Transport 2 x CAS I know that the AD stuff should be powered off last and powered on first, but what about the rest? Is there a particular order?

I actually have two sites who do it in different orders. Site one does it the same as patching, so outside in. Hub, CAS, Mailbox, domain controllers. Site two goes CAS, Mailbox, Hub, domain controllers. Mailbox being passive first, active last. I don't really think it makes much of a difference. CAS stops OWA, Outlook Anywhere traffic, Hub will stop email flow. For startup, mailbox first, then hub and finally CAS - only starting them once the GCs are up so Exchange can use them. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Hi, It doesn't matter which one goes first. Usually, I would power on DC before others. And then turn on mailbox server and mount all the database. after that, HUB and CAS.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.