In such case, you can retrieve your lost password. To retrieve a password click on the "Forgot your password?" button on the Log In page and the "Retrieve forgotten password" popup will appear. After filling in the required information in the corresponding fields your password will be sent to your e-mail. For this reason it is important that during registration you have entered the valid e-mail address. If you do not receive an e-mail with the new password, you should contact your system administrator.
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If you would like to see how Polar Help Desk looks in modes different than the one you are currently using, you can visit http://demo11.polarsoftware.com/polarhelpdeskprofessional/default.aspx