Currently there's no indication other then on the VBA appliance itself that there are pending updates. Therefore I created a PS script which we integrated into our monitoring system (N-Central) that pulls this data from the appliance. We get notified for pending updates and we can proceed to deploy them.
You can find the script on my gist page: https://gist.github.com/BasvanH/cc7cb3974657bde5926af69869e73b0b
Two variables are filled with the status:
$pendingUpdates is a integer and filled with the pending update count
$updateCategories is a string and filled with the categories of the pending updates.
You can adjust the script to your needs.
All the best, regards,