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Outlook is prompting me for credentials when I access mailboxes other than my own.
Clear Outlook Cached Credentials in Windows Credential Manager
- First, quit Outlook before proceeding.
- Click the Start Menu icon in the lower left corner of your Windows screen and type "credential manager" in the search text box that appears right above it. You should then see the Credential Manager show up in the list of results. Click the Credential Manager icon in this list.
- In the Credential Manager window locate any cached credentials that have the term "Outlook" in the name. Expand the details for the credential by clicking the arrow to the right of the name. In the details below click "Remove from vault." Do this for each credential with "Outlook" in the name if there are more than one. In newer versions of Windows, you're likely going to be looking for credentials that have the word "Office" in them and not "Outlook".
- Close the Credential Manager and restart Outlook. You should be prompted with a Windows Security window to renter your netID and password. Do so, and remember to check the box to "Remember my credentials." This will save a brand new cached copy of your credential in the Credential Manager.