
An IT Help Desk Technician is an information and assistance resource that troubleshoots problems with computers and similar products. Corporations often provide help desk support to their customers via a toll-free number, website and/or e-mail. There are also in-house help desks geared toward providing the same kind of help for employees only.

The Microsoft Certified Desktop Support Technician (MCDST) is a lower-level credential that demonstrates a technician can competently support end users and troubleshoot desktop environments running on Microsoft Windows. MCDST candidates are required to pass two core exams

The Microsoft Certified Application Developer (MCAD) credential provides industry recognition for professional developers who build powerful applications using Microsoft Visual Studio .NET and Web services on the Microsoft .NET Framework 1.0 and Microsoft .NET Framework 1.1.
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Visual Basic.NET
Visual C#.NET

Microsoft Certified Solution Developer (MCSD) certification is the highest level programming certification offered by Microsoft. To fulfill the requirements of the certification, a total of five exams (four core exams, one elective exam) must be passed. Some of the core exams are also requirements for the MCAD. Microsoft has declared that this certification will be focused towards the needs of developers using .NET Framework 1.0 and 1.1 versions. Developers using .NET Framework 2.0 and Microsoft Visual Studio 2005 are expected to consider undergoing Microsoft Certified Technology Specialist (MCTS) and Microsoft Certified Professional Developer (MCPD) certifications.
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Visual Basic.NET
Visual C#.NET

The Microsoft Certified Database Administrator (MCDBA) credential is for database administrators, who implement and administer Microsoft SQL Server databases. The certification is appropriate for individuals who derive physical database designs, develop logical data models, create physical databases, create data services by using Transact-SQL, manage and maintain databases, configure and manage security, monitor and optimize databases, and install and configure SQL Server.

The Microsoft Certified Systems Administrator (MCSA) certification certifies a user's knowledge in system administration of Microsoft Windows operating systems and is generally simpler than, but not a subset of, the MCSE. The Windows Server 2003 MCSA is achieved upon passing 2 networking system exams, a client operating system exam (generally Microsoft Windows XP), and an elective exam. The Windows Server 2000 MCSA title is granted after taking 3 core exams and one elective. Although the MCSA isn't a subset of the MCSE, it is possible to gain an MCSA on the way to an MCSE without doing any exams that are extraneous to the MCSE on Windows 2000.
Whereas the MCSE is supposed to certify a person's ability to "plan, design, and implement Microsoft Windows server solutions and architectures in medium- to large-sized companies", the MCSA certifies a holder's ability to "implement, manage, and maintain the typically complex computing environment of medium- to large-sized companies".

Microsoft Certified Systems Engineer (or MCSE) is the best-known and premiere Microsoft certification. It qualifies an individual of being able to analyze the business requirements for information systems solutions, and design and implement the infrastructure required. As of 2007, the MCSE is available for two different product lines; Windows 2000 and Windows Server 2003, each of which requires a different set of exams.
For the MCSE 2003, candidates must pass six core design exams (Four networking exams, one client operating system and one design exam) and one elective exam, for a total of seven exams. For the MCSE 2000, a candidate needs to pass five Core Exams (Four operating system exams, one design exam) and two electives. For the MCSE NT 4.0 (which is no longer available to earn, though it is still recognized as a valid certification), a candidate needed to pass four Core Exams (Networking Essentials, Windows NT Workstation, Windows NT Server and Windows NT Server in the Enterprise) and two electives.
The topic of these exams include network security, computer networking infrastructure, Active Directory, Microsoft Exchange Server, Microsoft SQL Server, and other topics of both general networking interest as well as specific Microsoft products.
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MCSE Security
MCSE Messaging
MCSE & CCNA