Outlook Windows Security field keeps popping up.

Question

I am working with a user who has been getting an error when trying to access Outlook. This only occurs with the Outlook application. He is able to access his inbox via the web portal, and he can sign into O365 to access Teams, Word, Excel, etc.

Previously, he was receiving an 80090016 error, however this now only occurs when trying to re-add his account to the device. When just trying to sign in, he will be repeatedly prompted to enter his credentials into the Windows Security field. We've confirmed his password is correct, but the Windows Security field will pop up again and prompt for his password. Clicking Cancel brings him to an error page stating "The set of folders cannot be opened".

Here is a list of resolution attempts we have taken:

1. Reinstall O365
2. Repair O365
3. Rename the OST
4. Create a new Outlook e-mail profile
5. Start Outlook in Safe mode
6. Delete stored credentials in Credential Manager
7. Clear keys from TPM
8. Remove and re-add Work or School Account
9. Rename the folder C:∖users∖%username%∖AppData∖Local∖Packages∖Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy

None of these have produced any results. He is still unable to bypass the Windows Security popup to sign in. This is a Windows 11 device.

Answer 1

We ran the assistant but it did not produce a resolution.

Answer 2

Have you found a solution? I've tried the ones you listed above as well and still getting that message. User is having to use webmail in the meantime.

Answer 3

have the same problem. not only my account- need a solution asap!!

Answer 4

Facing the same issue, also running the tool did not help. This is a Win10 machine.

Answer 5

You may try the Microsoft Support and Recovery Assistant it will help you to figure out what's wrong and offers the best solution for the identified problem. See https://support.microsoft.com/en-us/office/about-the-microsoft-support-and-recovery-assistant-e90bb691-c2a7-4697-a94f-88836856c72f#ID0EB6=Outlook