Forum Discussion
Signle Sign On and Outlook
Good day. Hope you are all well. I have an issue with single sign on and the way it is affecting the outlook client. We set up o365 with our clients and all seemed to be working well, we finished the...
In short:
Modern authentication is an authentication stack used by Office 2013 and 2016 client applications against Office 365. This authentication method allows the Office client application like Outlook to engage in browser-based authentication with the organization’s on-premises AD FS server, for example.
Office client will behave as a Web Browser when authenticating, it will send the Access Token requests directly to the authentication provider.
Depending on your on-premises infrastructure and configured features, I would refer to Vasil's answer and open a support case.