This article describes how to configure Single Sign-On (SSO) for Exchange 2010. SSO for Outlook Web Access (OWA) 2010 does not work when using the forms based authentication on Exchange 2010 and load balancing virtual server with AAA-TM traffic management policy.
Refer to Citrix Documentation for more information: https://docs.citrix.com/en-us/citrix-gateway/13/authentication-authorization/configure-sso/ng-single-sign-on-owa.html
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Citrix Documentation - NetScaler Deployment Guide for Microsoft Exchange 2010