I am Dale Hayter, a Microsoft and VMware certified Technical Consultant.

My blog has been built up over the years from my experience of working on an IT helpdesk and also from being out on-site.

Exchange 2003 Public Folders, 80090308 “The token supplied to the function is not valid”

If you get Error 80090308, “The token supplied to the function is not valid” when expanding the public folders in exchange 2003. Then use adsiedit.msc to do the following :-

Configuration >

Services >

Microsoft Exchange >

Domain Name >

Administrative Groups >

First Administrative Group >

Servers >

Servername >

Protocols >


1 >



right click on Exadmin and click Properties.

Find msExchSecureBindings and click edit.

Highlight :443: and click Remove.

Do a IISRESET. All good.