Visual Studio 2013 - The online service is not available

解决方案

Please try to configure .NET Framework to support strong cryptography to use TLS 1.2 or enable TLS 1.0 from registry.

For configuring to support strong cryptography > press Windows key + R > type regedit > navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft.NetFramework\v4.0.30319 > add a new registry entry named SchUseStrongCrypto > 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 to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\ > TLS 1.0 > Client > Enabled DWord value 1.

More details, see this doc: Configure for strong cryptography and this thread: Unable to login to VS 2013 upgrade 5.

参看

https://learn.microsoft.com/en-us/answers/questions/832154/visual-studio-2013-pro-the-online-service-is-not-a