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Add How to Fix Outlook and Office 365 Login Loops: Expert Solutions

Windy Napier 2025-12-04 08:19:12 +08:00
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Content<br>
Also, at the time, that user did not have MFA turned on. In the instances that this occurs the effected user is not new to MFA but has been running it for at least months. The problem appears to randomly affect users (I’ve had it affect myself once too), and the only solution appears to one of (or a combination of) the options in the OP. Out of 140 staff the problem seems to occur once every 2-3 weeks on average.
Additional resources
Please help can't afford a new computer if I throw this one against the wall. Yeap, you describe it exactly and unfortunately we still don’t have an answer. Closed the window without entering anything and Outlook returned to ‘Connected to Exchange’. Office 2016 is already Modern Authentication aware so APP passwords are not required.
Microsoft Office 365 Endless Authentication Loop Issue
We’ve got a support case opened with Microsoft on this one but it’s been open for about 3 months.There doesn’t appear to be any pattern to the issue occurring or the problem being limited to any specific computer or user.We are looking at using conditional access policies where a user with a Domain joined PC is not prompted for MFA.It happened right before lunch, locked my machine, went out for lunch, came back, and logged in, this time successfully.I checked my MS account info page, subscription is fine.I had this exact issue on another machine, that after 2.5 hours on the phone with MS support (via Zoom), the solution was to uninstall MS Office 365 and reinstall it.The user could use the Windows mail and calendar apps but Outlook wouldn’t connect and kept prompting for a password.
You may have to rebuild/restore your outlook folder/files which is a pain. I’d do that one step at a [solve Office 365 mailbox sync delays](https://www.fionapremium.com/author/lisa8453143/) time, forgoing the restore of the cached files. If this box is greyed out or disabled then you need to reset the Windows Credential Manager first. Or, any suggestion on how to fix this issue, even better.
Outlook stuck in an MFA loop
The [repair corrupted OST in Outlook](https://educhoice.co.uk/user/profile/55812) user had Office 2015 and Office 2016 credentials and Teams credentials that we deleted. We checked with Word that the account was connected–it was and the we opened Outlook and it immediately connected. We too have been seeing this more and more, all W10 on O365, although we use Okta as our MFA. Have looked all over and people have all sorts of possible solutions, but nothing we found to resolve the issue and get a new issue daily and just keep going through until it eventually works. I’ve seen this happen when the time and or date is wrong on the machine. It’s not caused by an out of sync MFA prompt as I have personally looked at a number of cases with the user as stepped through it.
Outlook 365 Password Prompt Issue on Windows Desktop
Microsoft Outlook 2016 and some recent builds of Outlook 2013 are not affected by this issue. Those versions have been updated to prevent the problem that is described in the "Symptoms" section. These versions have the Logon network security setting disabled or removed from the Microsoft Exchange email account [Outlook OST vs PST repair](https://body-positivity.org/groups/how-to-fix-sync-issues-in-outlook-or-owa-a-complete-guide/) settings. It requests me to login to my microsoft account. I then approve the login with my authenticator app. Then i get rerouted to the login page again to repeat the process.