We have an on-premises Azure DevOps, currently version 2019 Update 1. Last night I upgraded to 2019 Update 1.2, and initially everything appeared to be fine. However I noticed that builds weren't starting because I could see that the agents were disabled/offline in Collection Settings -> Agent Pools.
We have two agents - the "default" (v2.153.1) installed when we first installed DevOps 2019, and a second agent that I installed myself (v2.210.1). I checked that both agents' services were running in Services.msc, but otherwise had no idea what else to do.
It was getting late so I ended up restoring the server snapshot so it was back up and running for today. I'll need to attempt the upgrade again soon though. Assuming I encounter this issue again, what do I have to do to get the agents working?
