I've started testing the 15.21.1 Office Update and noticed that my Outlook client doesn't seem to authenticate through AD FS/Office 365 with our Office 365 environment thus resulting in the error below:
Reverting back to Outlook 15.19.1 and the authentication works fine again. I tested this on another Mac and the problem occurred there as well.
Tested on El Capitan, 10.11.4.
Does anyone else has this issue as well?
Solved! Go to Solution.
Jeff Kalvass, PM for Outlook for Mac at Microsoft, mentioned a little while ago in Slack...
However with the 15.21.1 release all users now get O365 modern auth (ADAL)
If you're seeing authentication issues, I suggest posting that information in the #microsoft-office channel in Slack/MacAdmins to give feedback. These are issues Microsoft will probably want to tackle right away.
I can confirm that checking the Forms authentication box at our AD FS authentication policy under Intranet fixes this issue.
Can you give a more details account of where you find this settings dialog box? We have had problems with word 2016 not knowing how to deal with our ADFS implementation on our SP server while word 2011 has no issues. I'm curious if this might help.
I know this is a late response, but I found that if you remove the account, then while adding the account back in, there is an option at the top right that says "Not Office 365?" Click on the hyperlink, and select "Exchange" You will need to fill in the detail like domain, password, username, server. I was able to get all of our macs for my company to connect using this method. All items working now.