Ingroup does not have this functionality. There are other group UDFs including GetADUserGroups - http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Number=198609#Post198609

Something like this should work... untested.

 Code:
$UserGroups=GetADUserGroups()
if ascan($Usergroups,"SYTEM_MIKE_TEST",,,1)
  ;do stuff
endif


How to use UDFs -
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Number=81943#Post81943

The rest of the UDFs are here -
http://www.kixtart.org/forums/ubbthreads.php?ubb=postlist&Board=7&page=1