Update 4/11/11: Please note that the E2010 SP1 RU3 will be available via Microsoft Update on 4/24/11. On March 14 th we posted an announcement to the EHLO blog about removing Update Rollup 3 fo...
Updated Jul 01, 2019
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Announcing the Re-release of Exchange 2010 Service Pack 1 Update Rollup 3 (V3)
Luckily we never deployed these but it was just a timing thing that worked out.
In the old days, we wouldn't install an Exchange patch unless it fixed a specific issue we were having or that we expected to have. Otherwise, we just waited for the Service Pack. I can see why they had to move to a rollup model- supporting customers who had chose a bunch of "a la carte" patches in different combinations and having to test each one against the other must have been a nightmare (all those patches have to apply to the same binaries.)
We run every Update Rollup through at least a month in our labs, and that's usually after it's been out in the "wild" for a month (sorry and thanks to everyone else I guess, for being the earlier adopters.)
To AnotherConcernedFan (one customer to another) - if you have premier support, your TAM could probably get as much info as possible for your management. I don't think you'd get very far with tier 1 other than break/fix (but I agree they should at least know the info that's posted here.)