Windows Server - Operating System

Active Directory (AD) - I have managed AD for many organizations, from 50+ users to several thousand users. Tasks such as auditing AD, managing user profiles, writing scripts to update user profile metadata (as required for cloud migration). 

AD Documentation of the forest and domain configuration, the Organizational unit (OU) structure, Group Policy Objects (GPOs), Password Policies, Audit Policies, Server names, their roles and IP addresses.