diff --git a/templates/workspace_services/guacamole/user_resources/guacamole-azure-linuxvm/terraform/apt_sources_config.yml b/templates/workspace_services/guacamole/user_resources/guacamole-azure-linuxvm/terraform/apt_sources_config.yml
index f46ccf0dad..43d1d1b7c0 100644
--- a/templates/workspace_services/guacamole/user_resources/guacamole-azure-linuxvm/terraform/apt_sources_config.yml
+++ b/templates/workspace_services/guacamole/user_resources/guacamole-azure-linuxvm/terraform/apt_sources_config.yml
@@ -15,5 +15,6 @@ apt:
     deb [trusted=yes] $PRIMARY $RELEASE-updates main restricted universe multiverse
     deb [trusted=yes] $SECURITY $RELEASE main restricted universe multiverse
     deb [signed-by=/etc/apt/trusted.gpg.d/microsoft.gpg] ${nexus_proxy_url}/repository/microsoft-apt/ubuntu/22.04/prod $RELEASE main
+    deb [signed-by=/etc/apt/trusted.gpg.d/microsoft.gpg] ${nexus_proxy_url}/repository/microsoft-apt/ubuntu/20.04/prod $RELEASE main
     deb [signed-by=/etc/apt/trusted.gpg.d/microsoft.gpg] ${nexus_proxy_url}/repository/microsoft-apt/repos/edge stable main
     deb [signed-by=/etc/apt/trusted.gpg.d/docker-archive-keyring.gpg] ${nexus_proxy_url}/repository/docker/ $RELEASE stable