How can I do a forced logout of all confluence users?

[Sorin Sbarnea (Citrix)]

I switched from one active directory to another and some people that were already logged-in are getting access denied errors.

I know that if they logout and login again the problem is solved but how can I log-out all of them from the server side?

Confluence version is 3.5

[Ramiro Pointis]

Maybe you could restart the confluence instance, that way everyone has to log in again.

[David Hergert _PAYX_]

I've restarted Confluence plenty of times and people that were previously logged in are still logged in due to their cookies.