Opening Outlook pops up Windows Security Diagloue wanting me to input credentials

Question

Opening Outlook pops up Windows Security Diagloue wanting me to input credentials

Tom Tirrell 0

Hi,

I'm at my wits end. Outlook all of sudden has started asking me to input the credentials when I open Outlook. I have so far done the following:

Reset password in MS Portal Admin
Reset password in MS Entra
Created a new Outlook Profile
Tried numerous registry changes
I can login via webmail with the authentication details, so I know they're correct
All updates are installed for Windows 11 Pro and Office365
Run both local and online repair of Outlook
The computer is joined using AzureAD so the prompt by default puts in AzureAD<<email address>> with the password prompt.
I have tried combinations with and without AzureAD\ at the front, the name as it appears in the Portal/Entra and also the profile folder path

If anyone can shed some light on what is happening and how I can fix it, it would be much appreciated.

Cheers,

SokiGuo-MSFT 31,551 Reputation points Microsoft External Staff

2025-03-11T07:29:11.5933333+00:00

Hi @Tom Tirrell

Welcome to our forum!

For better research, please provide more details about this case:

What does the password pop-up look like? Please hide your personal privacy information in the screenshot.

What version of your Outlook desktop client is?

Please try to check if the same is happening on another device.
Tom Tirrell 0 Reputation points

2025-03-11T10:36:49.51+00:00

Hi,

Popup attached. It is the lastest version of Outlook client. I can't give you the exact version as Outlook is never able to start due to this error but in Add/Remove Programs it shows Microsoft 365 version 16.0.18526.20144.

It only happens on this device.

I have also run the Microsoft Remote Connectivity Analyzer which gives all green ticks. They are running Windows Security and HP Wolf Security which has not changed. This happens regardless of location (as in at his office or home).

Cheers,
SokiGuo-MSFT 31,551 Reputation points Microsoft External Staff

2025-03-27T01:45:31.42+00:00

Hi @Tom Tirrell

Haven't received your message for a long time. I am checking the status of this case. Please let us know if you would like further assistance. Meanwhile, if the reply is helpful to you, please try to mark it as an answer, it will help others who encounter the same issue and read this thread. Thank you for your understanding and patience!

1 answer

Your answer

SokiGuo-MSFT 31,551 Reputation points Microsoft External Staff

2025-03-11T07:29:11.5933333+00:00

Hi @Tom Tirrell

Welcome to our forum!

For better research, please provide more details about this case:

What does the password pop-up look like? Please hide your personal privacy information in the screenshot.

What version of your Outlook desktop client is?

Please try to check if the same is happening on another device.
Tom Tirrell 0 Reputation points

2025-03-11T10:36:49.51+00:00

Hi,

Popup attached. It is the lastest version of Outlook client. I can't give you the exact version as Outlook is never able to start due to this error but in Add/Remove Programs it shows Microsoft 365 version 16.0.18526.20144.

It only happens on this device.

I have also run the Microsoft Remote Connectivity Analyzer which gives all green ticks. They are running Windows Security and HP Wolf Security which has not changed. This happens regardless of location (as in at his office or home).

Cheers,
SokiGuo-MSFT 31,551 Reputation points Microsoft External Staff

2025-03-27T01:45:31.42+00:00

Hi @Tom Tirrell

Haven't received your message for a long time. I am checking the status of this case. Please let us know if you would like further assistance. Meanwhile, if the reply is helpful to you, please try to mark it as an answer, it will help others who encounter the same issue and read this thread. Thank you for your understanding and patience!

Answer 1

Hi @Tom Tirrell

Thanks for your reply!

There are many reasons that can lead to password pop-up issues. There are some common solutions you can try:

Clear Cached Credentials: Open the Control Panel and go to Credential Manager. >>Under Windows Credentials, locate any entries related to Outlook or Microsoft Office.>>Remove these credentials and restart Outlook.
Update or Repair Outlook: Make sure your Outlook is up to date. You can also try repairing it via the Programs and Features section in the Control Panel. Repair an Office application - Microsoft Support
Please try using the Outlook keeps asking for my password diagnostic to troubleshoot issues in which Outlook continually prompts for a password.

In addition, based on user feedback, you can check if this calendar exists in your Outlook client.

User's image

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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SokiGuo-MSFT 31,551 Reputation points Microsoft External Staff

2025-03-17T05:31:07.9966667+00:00

Hi @Tom Tirrell

Following up to see if the above suggestion was helpful. If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

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Opening Outlook pops up Windows Security Diagloue wanting me to input credentials

1 answer

Your answer