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The admin_tls_version  system variable is like tls_version , except that it applies to the administrative connection interface rather than the main connection interface. For information about configuring encryption support for the administrative interface, see Administrative Interface Support for Encrypted Connections. 

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• authentication_windows_log_level 

## Note 

As of MySQL 8.0.26, the TLSv1 and TLSv1.1 connection protocols are deprecated and support for them is subject to removal in a future version of MySQL. See Deprecated TLS Protocols. 

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This variable is available only if the authentication_windows  Windows authentication plugin is enabled and debugging code is enabled. See Section 6.4.1.6, “Windows Pluggable Authentication” . 

This variable sets the logging level for the Windows authentication plugin. The following table shows the permitted values. 

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• authentication_windows_use_principal_name 

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