Make a backup copy of the database and store it in a secure place. On the File menu, click Open Database. Select the Exclusive check box, and then open the database. On the Tools menu, point to Security, and then click Set Database Password. In the Password box, type your password.
Passwords are case-sensitive.
The password is now set. The next time you or any other user opens the database, a dialog box will be displayed that requests a password. Caution If you lose or forget your password, it can't be recovered and you won't be able to open your database. Do not use a database password if you want to replicate a database. A replicated database can't be synchronized if the database password is defined.