We're experiencing an issue with ADFS where a user who attempts to log out of OWA using the Log Out button in the top right of the OWA window is automatically logged back in to OWA.
Searching the community here, I found a post that mentions the exact issue that we are experiencing but noticed that a solution was not found.
The post is here: http://community.office365.com/en-us/forums/148/t/166895.aspx
When signing out from OWA, I notice that the browser is re-directed to the following URL:
https://STS.COMPANY.COM/adfs/ls/?nossl=1&wreply=https://login.microsoftonline.com/login.srf%3Flc%3D3081%26ct%3D1372050282%26rver%3D6.1.6206.0%26id%3D260563%26wa%3Dwsignoutcleanup1.0%26nossl%3D1%26wreply%3Dhttps:%252F%252Fpod51057.outlook.com:443%252Fowa%252F%253Fexch%253D1&wa=wsignout1.0
This URL automatically forwards the user back to OWA, and signs the user back in automatically.
When signing out from community.office365.com, the browser is re-directed to another URL:
https://STS.COMPANY.COM/adfs/ls/?nossl=1&wreply=https://login.microsoftonline.com/login.srf%3Flc%3D3081%26ct%3D1372050101%26rver%3D6.1.6206.0%26id%3D273073%26wa%3Dwsignoutcleanup1.0%26nossl%3D1%26wreply%3Dhttp:%252F%252Fcommunity.office365.com%252F&wa=wsignout1.0
This logs the user out of community.office365.com
We'd like the sign out button to correctly sign a user out of Office 365, and not automatically log the user back in to OWA or any other Office 365 service.