Today the Exchange Team released version 2 of Rollup 5 for Exchange Server 2010 Service Pack 2 (KB2785908). This is an updated version of Rollup 5, released on November 14th but pulled due to a DAG issue; this updated Rollup should fix that issue. This update raises Exchange 2010 version number to 14.2.328.10.

For a list of changes included in the original version of Rollup 5, consult the original EX2010SP2RU5 post here. In addition, this version of the Rollup addresses vulnerabilities described in MS12-080 and will fix the following error when running Get-DatabaseAvailabilityGroup after installing of the original version of the Rollup:

An unexpected error has occurred and a Watson dump is being generated: Could not load type ‘Microsoft.Exchange.Rpc.ActiveManager.AmDeferredRecoveryEntry’ from assembly ‘Microsoft.Exchange.Rpc, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’.

Oddly, when comparing the lists of issues fixed, the following fix went MIA in Rollup 5 v2:

• 2748870 Declined meeting request is added back to your calendar after a delegate opens the request by using Outlook 2010

I’ll update this article when I receive information on the missing KB2748870 fix.

As of Rollup 4, its no longer required to disable/re-enable ForeFront Protection for Exchange using the fscutility to be able to install the Rollup properly. However, if you want to remain in control, you can disable ForeFront before installing the Rollup using fscutility /disable and re-enable it afterwards using fscutility /enable.

If you want to speed up the update process for systems without internet access, you can follow the procedure described here to disable publisher’s certificate revocation checking.

If you got a DAG and want to properly update the DAG members, check the instructions here.

Note that Rollups are cumulative, i.e. they contain fixes released in earlier Rollups for the same product level (RTM, SPx). This means you don’t need to install previous Rollups during a fresh installation but can start with the latest Rollup.

As with any Hotfix, Rollup or Service Pack, I’d recommend to thoroughly test this rollup in a test and acceptance environment first, prior to implementing it in production.

You can download Exchange 2010 SP2 Rollup 5 v2 here.