question

mark398 avatar image
0 Votes"
mark398 asked joyceshen-MSFT commented

Exchange 2019 single sign on (SSO) Issues

Hello All,

I have exchange server 2019 (dag) and i enabled single sign on "disabled form authentication and enabled windows authentication) and its working find, but when im trying to open owa from outside the organization im getting windows dialog box not customized owa login page:

199753-image.png
199708-image.png


and if the user ties to sing out from owa (outside the organization) then he could not sign-out and he must close all taps:
199716-image.png

Can i fix those issues without disable SSO



office-exchange-server-administrationoffice-exchange-server-mailflowoffice-exchange-server-connectivity
image.png (32.5 KiB)
image.png (12.4 KiB)
image.png (4.8 KiB)
· 2
5 |1600 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

Hi @mark398
Any progress here about this issue so far? Have you tried enabling forms-based authentication on the Outlook on the web virtual directory then verify the result?

 Set-OwaVirtualDirectory -Identity "Contoso\owa (default Web site)" -FormsAuthentication $true

If an Answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.


0 Votes 0 ·

Hi @mark398

I am writing to see how everything is going on with this thread. If you still have further concern on this, please feel free to let us know.


If an Answer is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.


0 Votes 0 ·

1 Answer

AndyDavid avatar image
0 Votes"
AndyDavid answered mark398 commented

Exchange has no idea if the user accessing OWA is internal or external.
You should enable Forms Based Authentication so the experience is the same for all users, otherwise, external users will get prompted with a windows prompt as you have seen

· 1
5 |1600 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

I'll build a lap and test it and update you.

thank you

0 Votes 0 ·