While using Windows 10, users encounter a windows security popup asking for a username and password. This issue could arise if the Microsoft Exchange dialogue box's Security tab's Logon network security settings are set to a level other than Anonymous Authentication. Therefore, right-click on the account, producing the Windows Security prompt, and choose More options to disable the popups. Uncheck the "Always prompt for login credentials" box under the Security tab, then save your changes. Click "OK" to keep your changes.
Read more: https://promptresolve.com/operating-sys ... -up-issue/