If the machine where Veeam Backup & Replication is installed is running Windows Server 2012R2 OS or earlier, and the Nutanix AHV Clusters are running AOS versions 5.20.4+ (LTS) or 6.1.1+ (STS), the following may occur:
Nutanix Clusters that were previously added to Veeam Backup & Replication may become listed as unavailable.
Attempting to add a new cluster may fail with the error:
Failed to get certificate from cluster '<IP>”.
Starting with AOS versions 5.20.4+ (LTS) or 6.1.1+ (STS), the CBC-based ciphers that Server 2012R2 and older use for TLS1.2 communication are no longer supported, and the ciphers that AOS does support do not exist in the older Windows versions.