Unified Access Gateway (UAG) 2010 Service Pack 4 (SP4) has been out for a while. Another much anticipated update which brings support for Windows 8.1, IE11, etc. Download the Service Pack here Review release notes here Read through the installation instructions here After performing the upgrade test UAG functionality from the client side, on a number of occasions the following error has been reported - "Forbidden Directory, Listing Denied Error code 403.14". If you find yourself among the unlucky few, read through the following post ; which applies, even though it references a different update. Here are the steps outlined in the post with a minor modification (steps 7-8): Open Forefront UAG management on the UAG server Open/Explore the Trunks under the HTTP and/or HTTPS connections Right click each Trunk and select Disable Save and Activate the UAG configuration Right Click the trunks again and select enable Save and Activate the Configuration again Open the