Just to check, is TLS 1.2 enabled on SOTI Surf browser?
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TLS 1.2 should work fine within SOTI Surf, you can check this functionality via this website: https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html. It will outline the available Protocols and Ciphers that your device supports.
If this resolves your query, please mark this post as the solution.
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