There are several issues with running the extension in a web farm environment. First all url’s that are supposed to be stored by either the sing-in or sign-out methods do not use a cookie but rather a session based object and thus does not work in a web farm scenario. The single signoutservice also uses a session based object in the form of SessionParticipantStorage . This means that when attempting to initiate a sps sign-out , no items are found in the storage and thus no SAML request is sent to the IDP . rather a simple redirect is issued obviously not the intent .
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