Hi @vasilis milingos ,
Welcome to Microsoft Q&A forum.
You need to enable/add TLS 1.0 or configure .NET Framework to support strong cryptography to use TLS 1.2 from registry.
Please check this thread: Visual Studio 2013 Pro - The online service is not available.
For configuring to support strong cryptography > press Windows key + R > type
regedit
> navigate toHKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319
> add a new registry entry namedSchUseStrongCrypto
> set its type to DWord > set its value = 1.(or creating a new registry entry by using PS command)For enabling TLS 1.0 > press Windows key + R > type
regedit
> navigate toComputer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols
> TLS 1.0 > Client > Enabled DWord value 1.
Have a great day.
Best Regards,
Tianyu
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