We have SQL Replication with the publisher and distributor running on Windows Server 2012 R2 using SQL Server 2016 SP2 within a secure network. The subscriber is running on Windows Server 2008 R2 within a different secure network using web synchronization, calling the replisapi dll, through the firewalls using https. This replication is working and has been for a few years now.
We recently tried to patch both servers to move to TLS 1.2 protocol only. It broke the replication and we re-enabled the other SSL and TLS protocols as a temporary fix. We MUST move to the TLS 1.2 ONLY - SOON.
What more do you need from me to help figure out why it is not working?
We have seen the error messages in the subscriber SQL Agent job log but they are fairly generic.
Where else can we look, and/or what else do we need to enable, to find more details about what is causing the problem?