Active Directory (AD) is a directory service that Microsoft developed for Windows domain networks. It is included in most Windows Server operating systems as a set of processes and services. Initially, Active Directory was only in charge of centralized domain management.
Erection problems can have many causes. 1  Physical problems, such as injury to nerves or loss of blood supply to the penis 2  . Other health problems, such as diabetes, high blood pressure, anxiety, and depression.  Side effects of certain medicines.
Many things can affect erections other than testosterone levels, and there are plenty of men with low testosterone who can still have good erections. However, in some instances, reduced sex drive or penile hardness could be partially due to a low testosterone level.