You are logged onto your computer and Outlook is up and running then boom! The Outlook password prompt pops up, you enter your credentials and sure enough, it pops up again!
Annoying? Yes. Solvable? Yes. This is an easy fix and usually it’s just a matter of removing an Outlook instance in credential manager but first we’ll make sure that you do not have Outlook set to always prompt for password.
First let’s make sure that you have Outlook settings set to use Windows credentials and you do not have Exchange properties checked to always prompt for username and password, which I’m sure you don’t. If you didn’t used to get the Outlook password prompt before then these settings are probably ok.
To check them click on File > Account Settings > Account Settings > double click your email account and go to the Security Tab. It should look like this with Always prompt for password Unchecked.
How To Get Rid of Outlook Password Prompt:
Close Outlook. Open Control Panel > click Credential Manager and look for any instance of Outlook. Sometimes there can be one or more. Click the drop down arrow then click Remove From Vault. Do this for any Outlook instance in credential manager. Open Outlook and you should not get the Outlook password prompt anymore!
Video: How To Stop Outlook Password Prompt