<UpdateIdentity UpdateID="164b3ae0-abdd-4999-9db7-cfbb495180be" RevisionNumber="51" /><Properties UpdateType="Detectoid" /><Relationships><Prerequisites><UpdateIdentity UpdateID="4d6255d2-e2e4-4a6f-b345-b82d153a2e6c" /></Prerequisites></Relationships><ApplicabilityRules><IsInstalled><Not><b.RegValueExists Key="HKEY_LOCAL_MACHINE" Subkey="SOFTWARE\Microsoft\Exchange\Setup" Value="ServicePackBuild" Type="REG_DWORD" /></Not></IsInstalled></ApplicabilityRules>