That was easy - took about 25 minutes.

Thanks again everyone.

From: bounce-9295868-8066...@lyris.sunbelt-software.com 
[mailto:bounce-9295868-8066...@lyris.sunbelt-software.com] On Behalf Of Sobey, 
Richard A
Sent: 10 March 2011 06:35
To: MS-Exchange Admin Issues
Subject: RE: Windows 2008 R2 SP1 patching in a DAG

Thanks everyone. Will let you know how it goes.

@Robert - yup, I wonder why that is? Kerberos issue? For CAS, I'm planning on 
removing the servers from the load balancing applicance for a couple of days 
before patching to minimise any disruption.

From: bounce-9295688-8066...@lyris.sunbelt-software.com 
[mailto:bounce-9295688-8066...@lyris.sunbelt-software.com] On Behalf Of Robert 
Peterson
Sent: 09 March 2011 23:10
To: MS-Exchange Admin Issues
Subject: RE: Windows 2008 R2 SP1 patching in a DAG

That's how I've been doing for 6 months or so, in fact the last few times I did 
all the updates during daylight hours!

Exchange 2010 DAG includes... (4)CAS/HUB VMs and (4)MB VMs, (4)Hyper-V hosts

The only issues I have seen...
A few Outlook 2007 clients will lose authentication and be prompted for 
credentials when I reboot a single CAS server. Sometimes I have a Smartphone 
lose "sync" and the account has to be deleted and re-added on the phone.


From: Sobey, Richard A [mailto:r.so...@imperial.ac.uk]
Sent: Wednesday, March 09, 2011 4:33 PM
To: MS-Exchange Admin Issues
Subject: Windows 2008 R2 SP1 patching in a DAG

Hi all,

Going to be patching the member servers of my DAG tomorrow with SP1 for Windows 
2008 R2. Anyone done this yet? My plan was simply to switchover, patch, 
switchover again, patch, balance the databases. Is it that simple or so I need 
to do some reading?

Thanks

Richard

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