Outlook (PC): Clear the Windows Credential Manager

If you're having issues opening Outlook and are using an Office 365 account, your issue might be improperly-formatted credentials stored in Windows Credential Manager. Here's how to remove them:

1. Close Microsoft Outlook.
2. From the Start menu, go to your Control Panel.
3. Select User Accounts.
4. Select Credential Manager.
5. In the Web Credentials and Windows Credentials sections, remove any stored credentials referencing the Office 365 or ms.outlook email addresses:
   1. Select expand.
   2. Select Remove.
   3. Select Yes to confirm.
   4. Repeat these steps until you remove all of the credentials associated with your email address.
6. Close the Control Panel window.
7. Launch Outlook. You'll need to sign in again using your Office 365 email address and password.

More info

• If you continue to have trouble, see Outlook error: The action cannot be completed.