Thank you for your reply.
Please be informed that usually a web meeting is held as a last resort when the issue experienced cannot be solved by any other means. Since we cannot afford the time required to schedule and conduct a meeting for every single customers issue, we do this on a very selective basis and generally only as a last resort when we've already tried other options.
In addition to that testing an application on our end is much more effective and faster and we could provide advice how is best to proceed. Demonstrating your application during a meeting wouldn't be sufficient to fully understand its specifics. Please let me know if the tested web page is public accessible and if not is there are a way to grant us access?
To answer your question - usually we create a GoToMeeting and invite the required participants. However if your network does not allow you to access that web meeting and you are allowed to use another tool only we are open to join customers' invitations. Please also bear in mind that due to the different time zones it is quite difficult to schedule a meeting with that short term.
Thank you once again for your understanding and I will be looking forward to hearing from you if you could provide access to your application.