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When trying to add or to rescan VMware vCenter Server you get the “The request was aborted: Could not create SSL/TLS secure channel” error message in Veeam shell.
The issue will happen during TLS handshake between Veeam server and VMware vCenter Server if its certificate signature is generated by algorithm which is not supported by OS of Veeam server. Following OS are affected: Windows Server 2008R2, Windows Server 2012, Windows Server 2012R2. Wireshark analysis example: https://blogs.msdn.microsoft.com/friis/2012/08/29/tls-1-2-handshake-failure/
Please install this Microsoft update to resolve the issue: https://support.microsoft.com/en-us/help/2973337/sha512-is-disabled-in-windows-when-you-use-tls-1-2 You can also add the necessary signature and hash algorithm manually in registry: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Cryptography\Configuration\Local\SSL\00010003 Value: Functions Reboot Veeam server to apply changes.
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