What is the name of the service included with the Windows Server operating system that manages a centralized database containing user account and security information?

Active Directory (AD)

Explanation:

Active Directory is the service integrated into the Windows server operating system that manages a centralized database containing user account and security information. In other words, it is a primary feature in Windows OS that manages and controls access to networked resources.

Some of it's other functions are:

i. Authentication and authorization of infrastructure resources such as users and devices.

ii. Storage of the information of infrastructure resources such as password.