in configure global security:

ticked active directory

specified a domain name, DC, Bind DN & password

under advanced, ticked use jenkins internal directory, and a local jenkins user

There is no test button, but I can save this configuration.   Having seen in examples a test button, is this something missing from this version?  or is it indicative I've an error in my config?

The active directory health shows domain, with DNS resolving and Global & LDAP catalogs exposed.  But in order to perform Server Health it says need to disable the cache (which is not enabled).

If I restart Jenkins neither my local jenkins user can login, nor can my domain user.  Both get the invalid user name or password.