See https://github.com/jenkinsci/active-directory-plugin/blob/fa573e714719aeb65b19a4de1c6c09a8079f2f04/src/main/resources/hudson/plugins/active_directory/ActiveDirectorySecurityRealm/config.jelly#L8-L37 and https://github.com/jenkinsci/active-directory-plugin/blob/fa573e714719aeb65b19a4de1c6c09a8079f2f04/src/main/java/hudson/plugins/active_directory/ActiveDirectorySecurityRealm.java#L527-L540. This means that on Windows the Test Domain button doesn't show up.

Neither TLS Configuration shows up

Reproduction steps

On Linux

1. Start Jenkins
2. Install active-directory-plugin
3. Go to Manage Jenkins > Security > Security Realm
4. Select Active directory
5. Click on Add Domain -> TLS Configuration is there and the button Test Domain shows up and it is clickable

On Windows

1. Start Jenkins
2. Install active-directory-plugin
3. Go to Manage Jenkins > Security > Security Realm
4. Select Active directory
5. Select Specify custom Active Directory domain name
6. Click on Add Domain -> TLS Configuration is not available and the button Test Domain doesn't show up