Related to this, there are also scenarios where Outlook does not detect Office 365 groups using Autodiscover where the (primary) SMTP address of the Office 365 group is not correct. After changing this value to ‘0’, Autodiscover starts with Office 365 and does retrieve the correct Office 365 Groups information. Unfortunately, this does not retrieve any information regarding Office 365 groups.

So, Autodiscover checks on-premises Exchange server and is redirected to Office 365 for Exchange Online information. When checking the registry, I found the ExcludeExplicitO365Endpoint DWORD set to 1 as shown in the following screenshot: I am using Office 365 ProPlus Click-to-Run which checks Exchange Online first for Autodiscover purposes, but then I realized I had been experimenting with some registry keys to change Autodiscover behavior. And both properties are set to FALSE, so this is not the case. In Office 365 Teams there are the HiddenFromExchangeClients and HiddenFromAddressListsEnabled properties (see the Hiding Office 365 Groups Created by Teams from Exchange Clients article from Tony Redmond for more information), but this is only Office 365 Groups and not an Office 365 Team. Make sure Outlook is connected and try again as shown in the following screenshot:

When I select Browse Office 365 Groups in Outlook, I see an error message saying We can’t show you group right now. Some users do see these groups in Outlook 2016 almost immediately, other users do not see anything (I’m in this group).

In our IT team we have several Office 365 Groups. I have had this annoying issue with Office 365 Groups (Groups, not Teams). Exchange Online Office 365 Outlook Outlook 2013 Older versions will just stop connecting to Exchange Online.įor more information, check MC288472 in the Microsoft 365 Message Center. Please be aware that this is completely independent from the Basic Authentication strategy that Microsoft is following. It will show something like Microsoft® Outlook® for Microsoft 365 MSO (6.20384) 64-bit. To check the version of Outlook you are using, select File –> Office Account –> About Outlook. More detailed version numbers of Outlook that will not connect anymore: Office version And yes, this includes Outlook 2010 (I know there are still clients out there running Office 2010!). In short, all clients older than Outlook 2013 SP1 with the latest fixes are no longer able to connect to Exchange Online. It was already announced on the Microsoft blogpost New minimum Outlook for Windows version requirements for Microsoft 365, Microsoft will stop support for older Outlook clients on Novem(which is 24 days from the time of writing!).

Outlook modern authentication registry