Microsoft Outlook is a software that not only lets the user send, receive, and manage e-mail, but also lets him/her manage calendar and contacts, such as friends and business associates.
For Microsoft Outlook 2003
To change a Microsoft Outlook password, follow these instructions:
- Open Microsoft Outlook
- Click the Tools menu
- Click the E-mail Accounts menu item
- Check View or change existing e-mail accounts
- Click the Next button
- Double-click the e-mail account for which the password should be changed
- Under Logon Information, type the new password in the Password box.
- Click the Next button
- Click the Finish button
For Microsoft Outlook 2007
To change a Microsoft Outlook 2007 password, follow these instructions:
- Click on the Tools drop down menu
- Choose Account Settings
- Select the e-mail account then click Change
- Type a new password in the Password field and click Test Account Settings
- Click Close, Next, and Finish
Note that changing a Microsoft Outlook password will only change the password in the mail client. It will not change the password in the mail server. To receive e-mails, the passwords in the mail client and mail server must match.
To change the password in the email server, read How do I change my Exchange password or How do I change my Unix password?.

Thanks for info, but the email password must not to be change before from Internet provider?
Please tell me how to change my password on Outlook 2010. I am getting hacked so bad it’s stupid. I can’t figure it out or find out on line. Please help. Thank you very much