Today I was installing Exchange 2007 SP1 on an HP Proliant DL380 G5 server running Windows 2008 x64. After the installation and reboot, I kept receiving the following error in the Event log:
Event ID: 4001 Source: MSExchange System Attendant Mailbox
A transient failure has occurred. The problem may resolve itself in awhile. The service will retry in 56 seconds. Diagnostic information: Could not find any available Domain Controller.
I did exhaustive research and finally came across this thread, which suggested updating the Intel NC110T NIC drivers and disabling the checksum offload options on the server’s network card. I was already running the most recent version (9.10 dated February 25 2008) of the HP driver for the Intel NIC, but did disable all the checksum offload options.
Following a reboot all of my Event 4001 error messages disappeared. The local administrators are going to open a support case with HP to try to determine some type of resolution that does not require disabling the NIC’s checksum offload options.