IMC / generating a SMS alarm for a port group

[RSSAUER]

Hi,

From our core switches I selected the imterfaces wich I need an alarm SMS for when going down.
I've collected these interfaces in a so called port group.
Under "Alarm notifications" I now want to set up a alarm SMS for this port group.
But it seems I can not add a port group as source for this notification.
Trying to make a custom view and adding the port group in there seems not possible.

Thanks for your help, Raymond