Hi,
For Microsoft I would go for Windows Server 2012 certification starting with MCSA: Server 2012.
Based on your mcitp cerfication you might have recieved the MCSA: Server 2008 certification (check you MCP transcript). If that is the case then you can upgrade by passing exam 40-417.
For Terminal Server (Remote Desktop Services since Server 2008 R2) there is the MCSE: Desktop Infrastructure. This requires MCSA: Server 2012 + two additional exams.
http://www.microsoft.com/learning/en-us/mcsa-certification.aspx
http://www.microsoft.com/learning/en-us/mcse-desktop-infrastructure-certification.aspx
There are also many free resources on the Microsoft Virtual Academy:
http://www.microsoftvirtualacademy.com/
Danny van Dam
MVP, MCC