I have 4 exchange 2010 SP3 RU mailbox servers. I continue to fail getting them updated to SP3 RU11. the question is do I have to install all the previous Rollups before I can Rollup to RU11 from RU7. that is the only thing I can think of now at this point. I don't recall.having to do that in the past but I wanted to a least check. UAC is disabled, all virus scanning software is also disabled. it does have some type of netbackup software that the storage team uses and I'm not sure if that is the issue but I stopped those services with no success. the OS is windows server 2012 DATACENTER. any suggestions would be great.
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