Q:

What order do I apply Update Rollups?

I need to apply an update rollup to Exchange 2010 SP1.  In Exchange 2003 I would do the FE's first, then the database.
Is this still the case with 2010?

A:

According to this Technet article (in the section called Proxying between Client Access Servers), the order that servers are updated in is as follows:

Client Access server
Hub Transport server
Mailbox server

There are special instructions for installing update roll-ups into DAGs according to this Technet blog post.

