SharePoint

Many of our customers wonder if it is better to use TMG or UAG for Sharepoint publishing, or whether either should be used at all. The answer, while not complex, involves some consideration of the relative capabilities and benefits of both pieces of software. In this post we will try to outline the key differences which will answer these questions. This post will give you a high level overview of the basic differences between the two.

A client that is trying to access an SSL enabled application on a backend server (e.g. Exchange) that is published through the Forefront UAG portal gets an error, specifically:

“An unknown error occurred while processing the certificate. Contact the site administrator”.

The cause:

When you install an update for Microsoft Forefront UAG, it does not appear under the Windows control panel > Add/Remove programs. So, If you have to remove it for some reason then how do you remove an update? Well, UAG has an in-built script to remove the previously installed updates. The script is located at

Supported client OS: Windows XP 32bit and Windows Vista 32bit

When publishing SharePoint portal through the Microsoft UAG Server it removes the default “Sign Out” link on the SharePoint portal which is otherwise visible when accessing internally (Corporate network without going through UAG). Some people do think this as an issue but really this isn’t an issue rather a feature of UAG. UAG Portal has a “log Off” button which when used logs the user off from the main UAG portal and terminates all connections from UAG to the internal servers.