last weekend we did an upgrade on 15 Windows 2008 R2 servers to SP1.
All these machines are VM's on vSphere 4.1.
Now we have serious network performance issues with only 1 of the machines.
unfortnuately it is our one and only Exchange server....
The other servers on the same ESXi host, have NO problems at all.
We already tried the following:
* uninstall SP1 = NOK (so we re-installed SP1 again)
* migrated machine to other ESX = NOK
* tests with Exchange services down = NOK
* removed VM LAN adapters and re-install = NOK
Looking desperate for a solution ??