I\'m working on a site that has a requirement to share session between a cms application and an online store application on the same domain eg.
mydomain.com
It appears the issue we were having was that the session cookie domain was being being set differently on the 2 applications. This meant that each application generated it's own sessionId.
We added
to our web.config and that seems to have solved it. Thanks for hte help, hope this helps someone else in the future.