Another Reason to Keep CUs Up-To-Date: Replication Error 20084

I was helping out with a SQL Server upgrade recently, going from 2016 to 2019. We ran into a problem when trying to run replmerg.exe for a merge replication subscription. Specifically, we were getting error code 20084, which means that the replication process couldn't connect to one of the instances. Interestingly, the process couldn't connect…