Windows Server 2008, 2012, 2106. Active Directory, Microsoft Exchange, MS SQL Server, Sharepoint, Group Policies, Single Sign On, ADFS, Office 365, Hosted Exchange, Outlook 365, Azure AD, Networking, Firewalls, Antivirus, Managed Security , Security Assesments, Vulnerability Scans , System Hardening, Network Security, Intrusion Prevention, IIS.