here is what i think i am going to try.
tell me if you think it should work.
1st turn off the ntp client on esx 3.5 u2 server i am going to VMotion VM's too
2nd make sure VM's tools do not have time "checked" Time synchronization between the virtual machine and ESX server operation system
3rd change date on ESX server that i am going to vmotion the vm too.
4th vmotion vm's to ESX server with date changed.
5th patch other esx 3.5 u2 server.
6th vmotion vm's to patched ESX 3.5 u2 server
7th patch and change date on other ESX 3.5 u2 server.
what do you think
Stephen