Here is which exchange services to restart in order to completely refresh an on-site exchange installation
1) Microsoft Exchange Active Directory Topology Service (this will toggle all the core AD Exchange services minus the below)
2) Microsoft Exchange Information Store
3)Microsoft Exchange System Attendant
With all that complete you should be all ready to go and continue trouble shooting/upgrading/modifying whatever it was you need to work on. Hopefully though if you hd any issues, this should have resolved them for you.