If you are experiencing this following error message “The local computer is not a possible owner of the clustered mailbox server” after running Setup /UpgradeCMS. There a couple of solutions to fix it.
One of the possible solutions is:
- Open AdsiEdit.msc
- Expand Configuration / Services / Microsoft Exchange / <Organization Name> / Exchange administrative Group / Servers
- Right click on <CMS Server>
- Locate the attribute msExchServerRedundantMachines and add the second node (a comma is required between nodes)
Now wait this new attribute replication among your DCs and run again Setup /UpgradeCMS.
Powered by Zoundry