[Serusers] Finding offline users.

[serusers at jtoga.org]

Hi,

I'm trying to have a caller (eg sender of invite) be able to detect the 
difference between a user that is 'offline' and one that really doesn't 
exist.   Current cfg methods allow for doing a lookup in the location 
table, but if the target isn't there - then a 404 is returned.

I think what I would like to do is then check the subscriber table....what 
is the best way to accomplish this?

(trying a 'lookup' on the subscriber table didn't work....)

Thanks in advance.
Jim.