I'm currently testing Azure SSO with Service Desk. Followed all the instructions and logging in is working just as it should. The problem is logging out is not working, if I leave the logout url blank then the page just refreshes when you click on "sign out", if you put in the logoff url provided by Azure then you get the SSO page with the error "SAMLRequest or SAMLResponse must be present as query string parameters in HTTP request for SAML Redirect binding".
This article seems to describe what is happening. It seems like SolarWinds might not implementing SAML properly. Before I go further I wanted to see if anyone else has ran into this issue and if they've found a solution. Thanks.