Jun 30 2022 07:44 AM
Jun 30 2022 07:44 AM
Hello, have researched all over for this specific issue and have came up with a lot of information, however, no permanent fixes. Have some mailboxes that seem to keep going into disconnected checking the status shows Authn Error. The issue seems to be with MFA and Outlook somehow going into basic auth(My best guess) because whenever MFA is disabled one the account it works properly connects, etc.. This is happening with the Office 365 on the newest update. Also hybrid setup with local AD and 365 sync. Things that have been tried:
Microsoft's regedit to force modern authentication
Recreating the windows profile (Did this and a user called back the next day with Outlook disconnected)
Running Microsoft Sara
Reboot (will fix temporarily then break)
Clearing all creds in credential manager
Clearing out the identity key in registry under Office\16\common
I haven't tried reaching out to MS and see if there's something they can do, I'm out of ideas and all the fixes that worked for others definitely haven't worked for me.
Jul 27 2022 08:08 AM
Yup - identical experience. Multiple disconnects per day - particular after coming back from hibernation. Connection status showing error in authn column. Other Office apps impacted too as they will hang when trying to access SP/OneDrive. Only option is to reboot. Went even further than you - completely wiped machine and rebuilt but issue came back. Deleted OL profile multiple times. Searched high & low for answers but no joy.
Also believe that this is related to MFA as I only ever experience this when out of the office. The office egress IP is defined as a trusted location so users never get prompted for MFA when here. My machine works flawlessly all day when here. Deeply frustrating...
Jul 27 2022 08:56 AM
Aug 12 2022 07:40 AM
Quick follow-up on this one. This is not definitive and I'm still testing...but results so far are interesting.
I was noticing that when the issue happens, it's not just Outlook. Issues with SharePoint files not saving/syncing and very odd issues with our corporate VPN where I could connect and ping internal resources but not access any web interfaces.
I also noticed that when I recently spent several days in another location and exclusively on wi-fi, the issue did not happen once.
Long story short, I found that the issue happens when at home or in the office (forget the previous comment about the issue not happening in the office - it did happen!) and when connected via ethernet (using a dock) and connected to wifi at the same time.
Still testing...but at this point, if I disable wifi when docked, the issue does not happen.
My device is a Dell Latitude 5420. Would be curious if anyone else can confirm this behaviour. Will revert back after a few more days of testing.
Sep 01 2022 05:04 AM
Sep 19 2022 06:28 AM
I’m hoping this is the final note on this chapter for me as well. Ran through all the suggestions and, unfortunately, no go for me. However, instead of the “Fix accounts” I removed/disconnected the users “Work or school account” and this is where it became an issue. So far the 2 that I’ve tested have not removed one took a log off/on and the other needed rebooted entirely. After the account is removed I restarted and then when everything came up asking to sign in i close them all out and opened outlook first. When asked to allow this app to sign me into other apps I selected “No, sign into this app only” after I did that outlook attempted to connect and was presented with a certificate error for outlook.office365.com it said the certificate was revoked but saying no to it outlook wouldn’t allow outlook to connect, but saying yes to it allowed outlook to connect I looked at the certificate and it all looks legit so I’m wondering if something that someone setup before I started here is doing something to the connection. So far have tested on 2 users and one has ran more than 2 days without issue and other has as well, but they’re not saying it’s fixed until Wednesday. So far that’s the news! Hopefully this thread helps someone if they run into this disaster.
May 15 2023 12:46 AM
May 16 2023 05:46 AM
So having resolved my issue last year, I got a new laptop and about 3 weeks ago, the exact same thing happened. This time, the wifi/ethernet thing was not the solution.
There's a separate thread about it here
Situation is cropping up for our users more often than I would like....and same for others too. No solutions apparent to me at this point. I just re-imaged the laptop and it's back to normal
May 16 2023 09:07 AM
So far when we run into this issue we remove their 365 accounts from email & accounts restart. Sign back into outlook and select “no sign into this app only” and we do the same for teams, one drive, etc. is it efficient? No, but so far it’s the only thing I’ve found so far that makes it so we don’t have to reboot nonstop and imaging or rebuilding a computer each time isn’t a solution for us as well. Maybe it has to do with signing into teams before outlook, but not sure now I just select “sign into this app only” and so far no issues.
May 17 2023 02:33 AM
Jun 05 2023 08:41 AM
Jun 05 2023 09:51 AM
Unfortunately, as previously mentioned the only thing that consistently works for us is disconnecting users account in settings, rebooting and then signing in one at a time saying “No, sign into this app only” nothing else has personally worked for us.
Jun 08 2023 01:05 AM
Jun 09 2023 05:12 AM