REG_DWORD 0 = Receive status information only about people who are in your contact list <-- Outlook 2003 Default 1 = Outlook requests status information from Exchange IM service about people who are not in contact list 2 = Uses RTC Service about contact who may or may not be on your contact list. <-- Outlook 2007 Default
Office 2003 SP3 has a fix to get presence when sip uri is in a different domain than default profile user domain. Office 2003 needs to have two reg keys set to get non-buddy presence and dynamic presence. Both can be applied using Office 2003 group policy as well. This is automatically set in Office 2007. If you have Office 2007, pls see below.
Please make sure that this registry key is set: [HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Common\PersonaMenu] "QueryServiceForStatus"=dword:00000002 "EnableDynamicPresence"=dword:00000001
The easiest way to disable all presence integration in Outlook is to set this key: