RD Gateway Deadlock KB Installation

Overview

MSFT has released Cumulative Update for a known RD Gateway Deadlock issue in their RD Gateway Service.
This Deadlock issue also impacts Workspots UDP connections through RD Gateways. The KB alters the code responsible for the Deadlock and also resolves the UDP connection issues seen when using Workspot Client to connect to virtual desktop.

Workspot strongly recommends installing the 2020-04 or newer Cumulative Update as soon as possible to resolve the UDP connection issue and mitigate the known Deadlock issue.

Reference Documentation

General:  https://support.microsoft.com/en-us/help/4550947/windows-10-update-kb4550947

Installation 

Prerequisites

Windows Server 2012 or Windows Server 2016 installed

MSFT RD Gateway Server service installed

A Maintenance Window will be required as server will need to be restarted. 

Any current connections through RD Gateway being updated will be disconnected until Server is back online and receiving connections again. 

Installing MSFT updates

1) Click the Search Windows Button in the Windows Task Bar.

2) Type 'updates' in the pop up.

3) Click on 'Check for updates'. 

4)  Ensure that the Updates that are available are 2020-04 or greater. 

5) If you do not see 2020-04 Cummulative Update for Windows (or newer version), click on 'Update History' to see if it has laready been installed:

If the update history shows 2020-04 or newer update installed, you are finished.

6) If updates are available, including 2020-04 or newer, then click on Install Now (depending on your server settings the updates may have already been downloaded, and your screen will look like this):

7) Monitor Windows Update.

8) Once the install is complete restart the server.

9) Once the server has come up from reboot (approx 20 minutes to install updates and reboot), confirm 2020-04 (or newer) Cumulative Update has been installed.

a) Click the Search Windows Button in the Windows Task Bar.

b) Type 'updates' in the pop up.

c) Click on 'Check for updates'. 

d) click on Update history.

e) Ensure you see 2020-04 (or newer) Cumulative update under update history. 

10) Once the server is online and RD Gateway service is running again the server will begin to automatically take new connections.