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Ugrading Exchange 2007 SP2 to SP3 upgrade question?

Exchange SP3 upgrade Installation Order
•      Upgrade CAS servers
•      Upgrade HUB servers
•      Upgrade Edge servers
•      Update Mailbox Servers and CMS (cluster mailbox server) Install Passive Mailbox Server first from the command line. Setup /m:upgrade `

After I install SP3 on the Passive Mailbox Server , can I install on the Active Server, or do I have to move the cluster and make the active server passive to install SP3 upgrade

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abhijitmdp

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ckeshav

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355LT1

ASKER

abhijitmdp,

I confused because MS technet informed me to upgrade in a different order than yours, please advise.

http://technet.microsoft.com/en-us/library/ff607233(EXCHG.80).aspx
We recommend that you upgrade your servers that are running the Mailbox server role after you upgrade your servers that are running the server roles in the following list. Upgrade your computers in the following order:

Client Access servers

Unified Messaging servers

Hub Transport servers

Edge Transport servers

Mailbox servers

If you upgrade your servers in this order, you may avoid potential service interruptions.

ckeshav

Yes this is the order you need to follow as in your comment
But when you come to the process of upgrading Mailbox server having a CCR( it would be definitely be on a single server). Then please make sure you follow the recommendations provided by me. All other roles would be a straight forward upgrade.

abhijitmdp

It is based on scenarios; If you are using Unified or not, whather u have a edge server or not. It depends,

Better first of all tell me your scenario, How many and which server roles you have.