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Applying windows update on exchange server outage concerns ?

Posted on 2015-01-18
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Last Modified: 2015-01-18
Is there any outage or downtime when I set WSUS or manual windows update to apply and install the Windows update to my exchange server 2010 ?

I have around 100+ patches to be applied and can only restart the server after the office hours with just 30 minutes time window, so i wonder if there is any outage when the update is being applied ?

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Will Szymkowski earned 500 total points
ID: 40556177
There is no down time specifically for Windows Updates. However depending on the version of Exchange you are running you will get Roll Ups (RU) via Windows Updates. If these RU are applied you will lose access to your Exchange environment because Exchange core services are stopped during the update process.

Only after the RU's have been applied will the Exchange services restart. I would also be performing a reboot after RU's are installed as well.

Also regarding Windows updates, it is not recommended to leave a server running for a long period of time after updates have been applied and it is pending reboot. You can run into issues depending what updates are applied and also if those components are initiated after updates are applied.

Best thing to do IMO is download the updates to the servers and then off hours install them.

Depending on the server specs CPU RAM etc your RU could take up to 1 hour to apply. So you need to take that into consideration.

Will.
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by:Senior IT System Engineer
ID: 40556617
Ok, I'm thinking to do the windows update only no RU and no .NET framework 4.0 and above (exchange server 2010 is using .net 3.5) so I guess it won't be a problem when installing it during the business hours ?

So that I can just reboot it during the out of office hours.
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by:Will Szymkowski
Will Szymkowski earned 500 total points
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That is correct. As I had mentioned I would not leave updates longer then a couple of days pending reboot. Do it with caution.

Will.
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by:Senior IT System Engineer
ID: 40556733
Thanks !
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