Hi Experts - I ran into some trouble last night trying to patch my Exchange 2010 servers. I have two setup in a DAG and the first patch went well but when I tried it a second time the update failed. The first install went normally with no prompts, the second is trying to find a file called exchangeserver.msi. I happened to have the install files on the local drive so I pointed it there but I then get an error about it not being a valid install file. This is incorrect, its the same .msi used to apply SP3 and is the same as what's on the server that successfully applied the update. So now the two servers are on slightly different versions of Exchange which I'd like to minimize.
Any ideas on what might be the problem and how I can work around it to get this server patched?