The CAS should be patched before the mailbox servers. "Don't upgrade any Mailbox server from one version to another until all Client Access servers within the Active Directory site have been upgraded to the target version." http://technet.microsoft.com/en-us/library/bb629560.aspx
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Daniel Chenault Sent: Monday, 8 September, 2014 4:17 PM To: [email protected] Subject: Re: [Exchange] Patching Exchange Only issue I ran into (2010 sp2ru3 -> sp3ru6) is it overwrote the IIS settings on my CAS servers (custom redirects to provide two-factor author for ext connections). > On Sep 8, 2014, at 14:03, "Dave Lum" <[email protected]> wrote: > > I have a three-server Exchange Exchange 2010 environment currently - > one CAS and two mailbox servers. They are all currently at SP2 update0. > Without getting into the why I'm asking, is there any risk in brining > the mailbox servers to E2010SP3UR7 while leaving the CAS server where it is? > > It would be a short-term (few days) scenario but my guy says there may > be some reasons to not to have them too far off patching levels. > > Comments? > > Dave > > >
