What CompTIA exams can I apply toward a Microsoft Certification?

Your CompTIA A+, Network+, Server+ or Security+ certification can be used as electives or equivalents to several of Microsoft's advanced certifications. A CompTIA certification will not only apply as an elective, but is also a separate and distinct credential.

Microsoft Certified Systems Administrator (MCSA)
Microsoft accepts CompTIA A+, Network+ and Server+ certifications as alternatives to elective exams in MCSA Microsoft Windows 2003 and MCSA Microsoft Windows 2000 certifications.

MCSA: Security on Windows Server 2003 and MCSA on Windows 2000
This specialized MCSA certification has an emphasis on security. The MCSA: Security exam tests candidates on the Microsoft Windows 2000 and Windows 2003 tracks. You must pass three core exams and two security specialization exams, one of which may be the CompTIA Security+ exam.

Microsoft Certified Systems Engineer (MCSE) Windows Server 2003 and Microsoft Windows 2000
Microsoft accepts CompTIA Security+ certification as an alternative to passing an elective exam in the MCSE: on Microsoft Windows 2000 and in the MCSE: Windows Server 2003 certification programs.

MCSE: Security on Windows Server 2003 and MCSE on Windows 2000
This specialized MCSE certification has an emphasis on security. The MCSE: Security candidates taking the MCSE: Security Windows 2000 track or the MCSE: Security Windows 2003 track, must pass four core exams three security specialization exams, one of which may be the CompTIA Security+ exam.

Applying Your CompTIA Credentials Toward a Microsoft Certification
See this link http://www.comptia.org/certification/related/ms_apply.aspx