Microsoft has announced Outlook 2016 does not support Exchange Server 2007 and earlier.
After upgrading to Outlook 2016 for Windows, you will see the following error message:
This reads: “The resource that you are trying to use is located on an unsupported version of Microsoft Exchange. Contact your e-mail administrator for assistance.”
Then, when you open Outlook, you get another error message telling you Outlook can’t open your data files.
This happens because Outlook 2016 doesn’t support Exchange Server 2007 and earlier.
To use Outlook with the Exchange 2007 enabled mail account, Microsoft propose:
- Uninstalling Outlook 2016 and reinstalling Outlook 2013 on your PC, if you upgraded to Office 2016 from Office 365 Home, Personal or University.
- Uninstalling Office 2016 and reinstalling Office 2013 Home and Business, Office 2013 Professional or Outlook 2016 for Windows standalone if you previously had one of these earlier versions of Office on your PC.
- You can also contact your Internet Service Provider (ISP) or company email server administrator about your email account to ask them if they plan to upgrade their Exchange Server to a newer version. If so, and after the Exchange upgrade, you can reinstall Outlook 2016 for Windows.