Johnson Matthey moved from 34 Active Directories to a single Active Directory two years ago. The company’s IT leaders say employing a single directory allows for better integration of existing systems, heightens security and more effectively facilitates communication and collaboration among locations. Active Directory authenticates and authorizes users and computers in a Windows network, assigning and enforcing security policies for all computers and installing and updating software. No employee – including the CEO and CIO – can access all of the data stored on the company’s systems.”]
Source: https://www.cuinfosecurity.com/active-directory-consolidation-aids-security-a-6000