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.
What causes erectile dysfunction? Before an erection can occur, numerous organ systems in the body need to function properly. Should any or all systems fail, erectile dysfunction may result. These systems include the brain, hormone release, muscles, nerves, arteries, veins, and emotional response.