Office 365 / Windows 7 / Office 2016

Anser Leon 41 Reputation points
2021-07-14T18:17:26.71+00:00

Hi, I got a unique setup that I have been starting to experience some issues and I need y'all feedback.

I have a specific customer with a group of computers on Windows 7 / Office 2016 Standard / Office 365 email accounts. We have been in the process of upgrading the Windows 7 computers to Windows 10 slowly.

However, two weeks ago or so I started to experience an issue on the remaining Windows 7 computers. Outlook 2016 would no longer connect to Office 365.

M team has done all of the proper troubleshooting and all of the DNS records are in place. Even Windows 10 computers with the same version of Office 2016 connect fine to Office 365.

According to our research we have not found any update, warning that would prevent an Outlook 2016 on a Windows 7 computer to connect to Office 365.

Does anyone know if this is Office 365 rejecting the OS ? Are there any KB or alerts put out by Microsoft advising the compatibility issues ?

Can anyone point me to the right direction ?

Outlook | Windows | Classic Outlook for Windows | For business
Exchange | Exchange Server | Management
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  1. Yuki Sun-MSFT 41,376 Reputation points Moderator
    2021-07-15T08:06:22.283+00:00

    Hi @Anser Leon ,

    Does anyone know if this is Office 365 rejecting the OS ? Are there any KB or alerts put out by Microsoft advising the compatibility issues ?

    I tried searching a lot but didn't see any official article explicitily stating the supportability of Office 365 services with Windows 7. According to this document, currently it's supported for Office 2016 to connect to Office 365 services include Exchange Online. And this article mentions that "Non-subscription versions of Office used by organizations, such as Office Professional Plus 2016 or Office Standard 2013, will continue to be supported(on Windows 7) based on the Fixed Lifecycle Policy. ", so my understanding is that it's still supported to connect to Exchange online account on Outlook 2016 running on Win7.

    However, two weeks ago or so I started to experience an issue on the remaining Windows 7 computers. Outlook 2016 would no longer connect to Office 365.

    Considering that it's a recently occurred issue, may I know if any change was made on the Windows 7 machines right before this issue started?

    Besides, based on my experience, please try testing on one of the affected maichine by adding the registry key below and see if it can help:
    Important: Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

    Registry key: HKCU\SOFTWARE\Microsoft\Office\16.0\Common\Identity\EnableADAL
    Type: REG_DWORD
    Value: 0
    114966-1.png


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