active directory related material..
System Center Operations Manager
Key Management Server, Volume Activation
Network Access Protection. Network Access Protection is designed to protect the network by validating System Health when the Client attempts to connect.
PKI, root certificates and subordinate certificates
Windows Server 2008 and Windows Server 2008 R2
All about Windows Server 2012
All about the new Windows Server 2016, Nano server 2016
going Virtual with Hyper V
configuration and usage of Exchange 2007, Exchange 2010
setting up a webserver in Windows ? post here
All about SCVMM
The Next Generation of Unified Communications - Microsoft Lync - The next generation of Communications Server. Unite voice communications, IM, and audio, video and Web conferencing
Application Virtualization, SoftGrid, AppV, virtualising applications
anything sharepoint related
Windows Server Update Services delivers updates to corporate environments from Microsoft Update.