My bad: I replied to your email and it showed up here as a blank repsonse. The solution you reference does not work.
I had seen that post and tried it. Tried it again after your reply above.
I wind up with two jsessionid cookies, one with a subdomain, and one without. Apparently, the operative one uses the subdomain, because when I switch to the other subdomain, I'm not logged in and another jsessionid cookie is created for that subdomain.
I've tried setting the domain-only cookie in both OnSessionStart and OnRequestStart in my application.cfc. I've tried in it CF10 and CF11.
Can't make it work. Any other ideas? They'd be most welcome.
I don't have any further ideas - hopefully someone else will jump in here. I haven't worked with subdomain cookies.
I'll delete the empty post and my response to it to clean up the thread.
-Carl V. - Moderator