Hey, thanks for this.  I've made an issue (https://github.com/galaxyproject/galaxy/issues/2671)  and will check it out today.

On Wed, Jul 27, 2016 at 12:44 PM Ryan G <ngsbioinformatics@gmail.com> wrote:

Hi all - We are using a SSO system so that user's authenticate externally from Galaxy.

when I impersonate a user then try to log out as that user, I'm unable to.  I get the page "

Access to Galaxy user controls is disabled

User controls are disabled when Galaxy is configured for external authentication."

If I close the browser down, and restart, I get my SSO log in page, but when I get to Galaxy, I'm still impersonating the user. 

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