I have managed Server 2012 in production environment.
Active Directory, Maintaining Users, Active Directory Replication to different sites. Active Directory Backup; disaster recovery, how to bring back crash servers by different backup types. DNS, zone backups, transfers.
I worked on Windows 2000/2003/XP and Win7,10 in Client/Server professional environment; I have good theoretical knowledge of both flavors in corporate level. Configuring Outlook as mail-client.