The Fax Service Properties Dialog. Don’t go there! Users familiar with Windows 2000 Fax are accustomed to using this dialog box to change the logon for the fax service. In Windows XP, however, you should not change the logon: you can now access your Outlook profile without changing the logon and the fax service can only run under the local system. Users who need to change the logon for other reasons are out of luck until Microsoft comes up with a solution.