All these three forms of accreditation (meaning, MCP, MCSA and MCSE) are Microsoft forms of accreditation. MCP stands for Microsoft Certified Professional. MCSA is the acronym for Microsoft Certified Systems Administrator. And MCSE stands for Microsoft Certified Systems Engineer. MCP is the most basic term for Microsoft accreditation in the Microsoft ladder of accreditations. MCSA is more specific than MCP, and MCSE is higher than the MCSA form of accreditation. The importance of Microsoft certifications comes, first of all, from usage of Microsoft products meaning, if your organization is not using Microsoft products, Microsoft certifications would be of not much use. The other importance of Microsoft certification is that it has been proven that when an IT team aims for Microsoft accreditation and all the team members eventually get accreditation, then that team becomes much more effective and successful at its IT tasks.
The type of Microsoft accredited skills the team members possess also has a direct effect on organizational performance in certain IT functions. This explains why employers invest in the training and then accreditation of specific IT department keymen within their organization because the impact on their organization is exponential.
So to merge the benefits brought by these different forms of accreditation into one competitive team, you may need a few members accredited in MCP, one or two accredited in MCSA, and at least one who has reached MCSE status. If more of your team members can reach all three, that would be a very huge advantage for your organization.