Hi I am planning on getting our Exchange server updated next week to the latest service pack and associated patches. Just wanted to check that I can do a straight upgrade from SP1 to SP3 of exchange 2007? Also my intention was to follow the steps below. Would this be the correct method? Exchange sits as a VMware ESX4 virtual machine. This is what I intend to do: Turn off Receive Connectors to ensure all mail in and out stops flowing whilst I am doing the upgrade. Switch the Exchange server VM off Snapshot the VM Bring the server back online Do the service pack upgrade to SP3 as well as other updates. Ensure fully patched up. Turn receive connectors back on. Make sure Exchange is working and mail flowing in and out. Once up and running, Delete the snapshot Would others follow this sequence? Any other advice anyone can provide would be helpful. I dont see any issues but thought I would check.... Thanks

SP1 to Sp3 will update the schema. which should be given enough time for replication. If you are using clusters , ccr, scr etc the upgrade process is different. the usual updtae process is cas, hub and mailbox servers ( edge can be done before or after cas/hub servers) The steps defined above are related to ESX server and appears to be OK. http://technet.microsoft.com/en-us/library/bb676559(EXCHG.80).aspx

Additional Info: “Known Issues” section in Release Notes for Exchange Server 2007 SP3 James Luo TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.