Dit is een bug in Windows/Office en heb het al een paar keer gezien. De volgende website beschrijft goed welke opties je kunt proberen:
https://superuser.com/questions/1349327/outlook-needs-password-but-dialog-box-disappears
A collection of various known Outlook fixes for login problems :
- Run Credential Manager, and if your account is listed ensure that it’s correct.
- If not correct, fix it.
- If correct, try deleting it, reboot and log into Outlook.
- Logging-in into Web Outlook might sometimes show an existing problem such as the need to change the password.
- Start Outlook in safe mode by running
Outlook.exe /safe
and enter the ids if asked. - Unlink the Microsoft Account from Outlook
- Disable Modern Authentication by regedit to
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity
, create a DWORD item namedEnableADAL
and set it to zero. - Under the same registry key, create a DWORD item named
DisableADALatopWAMOverride
and set it to1
. See Microsoft article.