Pro Outlook 2010

Step 1
Click "File," "Account Settings" and then "Account Settings" from the drop-down menu.

Step 2
Click the "Data Files" tab in the Account Settings Window.

Related Reading: A File Cannot Be Opened in Microsoft Office Outlook

Step 3
Click "Outlook Data File" from the list of accounts and then "Settings."

Step 4
Click "Change Password."

Step 5
Enter the same password in the "New Password" and "Verify Password" fields. Leave the "Old Password" field blank, unless you previously established a password.

Step 6
Click "OK" twice.

Step 7
Repeat for each data file listed under the Data File tab. There will be one file for each mail account you created. Click "Close" to exit Account Settings.

Tip

To remove the password, enter your password in the Change Password window and leave the new password fields blank.