To remove the user credentials from Credential Manager:
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Click Start > Control Panel > User Accounts > Credential Manager.
Note: if View by is set to Category, click user accounts first, and then click Credential Manager.
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Select the Windows Credentials option. Locate the set of credentials that has either Outlook or Microsoft Office in the name and then expand the corresponding folder
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Then click Remove from Vault (depending on which version of Windows you are running).
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Repeat step 3 for any additional sets of credentials that have the word Outlook or Microsoft Office in the name.