LockDown32
asked on
Migrating Mailboxes from SBS 2008 to Office 365
My customer has a SBS 2008 Server and uses the built-in Exchange Server 2007. I migrated their mailboxes to Office 365 via a cutover migration. Now comes the impossible part. Their workstations are a mix of WIndows 7 and WIndows 10. Outlook on those workstations is a mix of 2010 and 2013.
I can manually configure their Outlook to point to Office 365 but it will only stay for maybe 4 hours and reverts back to their Exchange Server. Simply opening Outlook and letting it sit it reverts back. I can tell when the Outlook 2010 workstations revert back because a pop-up asking for their email address and password keeps popping up. I can tell when the Outlook 2013 workstations revert back because they get a pop-up stating "the microsoft exchange server administrator has made a change that requires you to quit and restart outlook". At that point Outlook has reverted back to pointing to their Exchange Server.
I have tried stopping all the Microsoft Exchange services on their Exchange Server. Nothing I have tried works. I cannot keep Outlook pointed to Office 365. It keeps automatically reverting back. My guess is that I need to change the autodiscover services on the Exchange Server but that is just a guess. Does anyone know how to do this?
I can manually configure their Outlook to point to Office 365 but it will only stay for maybe 4 hours and reverts back to their Exchange Server. Simply opening Outlook and letting it sit it reverts back. I can tell when the Outlook 2010 workstations revert back because a pop-up asking for their email address and password keeps popping up. I can tell when the Outlook 2013 workstations revert back because they get a pop-up stating "the microsoft exchange server administrator has made a change that requires you to quit and restart outlook". At that point Outlook has reverted back to pointing to their Exchange Server.
I have tried stopping all the Microsoft Exchange services on their Exchange Server. Nothing I have tried works. I cannot keep Outlook pointed to Office 365. It keeps automatically reverting back. My guess is that I need to change the autodiscover services on the Exchange Server but that is just a guess. Does anyone know how to do this?
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
For anyone else who happens across this thread here is the definitive answer. The Exchange Server remains un-touched. You need to edit the registry on the workstations (user profiles). When this is done autodiscover will connect to Office 365 and not the local Exchange Server:
Outlook 2016 replace XX.X with 16.0
Outlook 2013 replace XX.X with 15.0
Outlook 2010 replace XX.X with 14.0
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v PreferLocalXML /t REG_DWORD /d 00000000
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeLastKnownGoodURL /t REG_DWORD /d 00000001
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeExplicitO365Endpoin t /t REG_DWORD /d 00000000
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeScpLookup /t REG_DWORD /d 00000001
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeHttpsRootDomain /t REG_DWORD /d 00000001
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeHttpsAutodiscoverDo main /t REG_DWORD /d 00000001
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeHttpRedirect /t REG_DWORD /d 00000000
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeSrvRecord /t REG_DWORD /d 00000001
REG ADD HKCU\Software\Microsoft\Of fice\XX.X\ Outlook\Au toDiscover /v ExcludeSrvLookup /t REG_DWORD /d 00000001
Outlook 2016 replace XX.X with 16.0
Outlook 2013 replace XX.X with 15.0
Outlook 2010 replace XX.X with 14.0
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
REG ADD HKCU\Software\Microsoft\Of
ASKER