Forum Discussion

Copper Contributor

May 15, 2023

Solved

New Outlook - Cannot connect to server

A few of us in the IT Department are trying to preview the new Outlook. When we click the slider the new Outlook launches, sits at the Setting up account for a few minutes, then errors out with "...

Microsoft 365 Insider

outlook

TimTrag
May 22, 2023
George_W_Argiropoulos

I was actually able to figure this out in my organization at least. I found this article,https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook, and determined that OneWinNativeOutlookEnabled has to be set to $true. If it is set to $false or blank for a user then they cannot connect.
As soon as I changed it from blank to $true, and waited about 15 minutes for it to propagate, for my colleague and I the issue went away

TimTrag

Copper Contributor

May 22, 2023

George_W_Argiropoulos

I was actually able to figure this out in my organization at least. I found this article,https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook, and determined that OneWinNativeOutlookEnabled has to be set to $true. If it is set to $false or blank for a user then they cannot connect.

As soon as I changed it from blank to $true, and waited about 15 minutes for it to propagate, for my colleague and I the issue went away

George_W_Argiropoulos

Copper Contributor

May 22, 2023

Thank you so much. After the first guy in IT tried it and comlained they had disabled it without my knowing. This worked perfectly and allowed me to enable it just for my mailbox. Thanks, TimTrag!

elieelkarkafi
MVP
May 22, 2023
Please click Mark as Best Response & Like if my post helped you to solve your issue. This will help others to find the correct solution easily.
- George_W_Argiropoulos
  Copper Contributor
  May 25, 2023
  It did not. TimTrag's post was the one that helped resolve the issue.