A while back (June 2011), I wrote a post on how to implement TMG, Single Sign-On (SSO) and strong authentication with Office 365. It was, as it turns out, an incomplete story.
Tristan Watkins has written an excellent article on how to implement single sign-out using TMG with Office 365 and ADFS 2.0. It goes into great detail about issues with sign-out from non-federated proxies with ADFS/O365 and explains the various nuances associated with Office 365 sign-in…. you can read this article here:
http://tristanwatkins.com/index.php/office-365-single-sign-out-isa-tmg-adfs-proxy/
The Access Onion 
Thanks Mylo! With most of the credit due to you in reality.
Look forward to reading your next post 🙂
Took me a while, eh? 😉
Hi Tristan,
You’re famous dude…. 🙂
https://devcentral.f5.com/weblogs/gcoward/archive/2012/08/30/big-ip-and-adfs-part-4-what-about-single-sign-out.aspx
Regards,
Mylo
Hehe. I thought I was famous when you posted. 🙂 Thanks for letting me know!