SLO not working properly in IE

[Cantor, Scott]

> When I access /idp/profile/Logout, I get the following header:
> 
>    Set-Cookie: shib_idp_session=""; Expires=Thu, 01-Jan-1970 00:00:10 GMT;
> Path=/idp; HttpOnly
> 
> This is IDP v3.3 running under Tomcat v8.0.26.

There seems to be a Tomcat system property that influences what it does, and for whatever reason it seems to be set differently for the OP. There's some discussion of it in the bug (IDP-1141).

-- Scott