Over the last couple weeks we started getting errors in our Backup Copy jobs. I worked with Veeam support as well as a couple other vendors, and found the error was caused by the Intrusion Prevention System on a firewall. The specific error was "Failed to decrypt TLS data: (336130329)". The issue is resolved, but we didn't actually realize it was happening for about a week, because B&R was reporting the jobs as "Success", while in fact they were fatally flawed.
When a BC job completes, an email is sent. Here's an example:
All looks well, but look at the actual log of said job:
The TLS error results in the data not being transferred completely, and the cloud copy is not valid. I found it quite alarming that the job was listed as a Success. This error should be flagged in red and the job should've been reported as Failed. For now, my trust in the daily emails is gone.