Clients take a long time to log off an OWA session after you publish an OWA server and configure OWA forms-based authentication in ISA Server 2004 -- why?

When the S/MIME control is not installed, the Forms-based Authentication logoff program in ISA 2004 causes 2 unnecessary HTTP POST requests to run, slowing down the user's logoff process. This Microsoft article provides information on how to correct this issue.

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Will tablet and Smart phone use be a big part of your OWA 2013 deployment?