If you have a password protected Outlook Data File (.pst) (Outlook Data File (.pst): Data file that saves your messages and other items on your computer. You can assign a .pst file to be the default delivery location for email messages. You can use a .pst to organize and back up items for safekeeping.) and didn’t select the Save this password in your password list check box, when you open the file, you are prompted for the password.
If the password that you type inside the Password box is incorrect, an error message appears.
Passwords are case-sensitive. Accidentally turning on CAPS LOCK is a common reason why a password attempt fails.
Important Passwords can’t be reset or recovered if lost. If you forget your password, Microsoft can’t retrieve it.
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