When moving a pst file to a new computer, Outlook will often ask for a password. You may not be forgetful - the moving process does something to make Outlook think there is a password. You will need to use a password recovery utility to get the password. (It will likely be a random generated password, not a passphrase or password you would have used.)
When you add a password to a pst file, every time you start Outlook, a dialog box will ask you for the password. Once you enter the password, the contents of the pst will be accessible to anyone who uses your computer while Outlook is open.
If you know the password but are tired of using it, you can remove it or change it and save it to your password list. If you can't remember the password, see Tools for utilities that can show you the password.
- Right click on the .pst file name in your folder list.
- Choose Properties (Data Files Properties in Outlook 2010 and newer), then Advanced button.
- Click Change Password button.
- Type your password in the Old password field.
- Leave the New password and Verify fields blank.
- Click Ok and work your way back to Outlook.
Tools to Recover Lost Passwords
Because these apps can read passwords, your security software or browser may block the download as a security threat. You need to allow or trust the download.