Commercial and channel
CSP
Cloud Solution Provider
CSP, Cloud Solution Provider, is Microsoft's partner programme through which organisations buy and manage their Microsoft cloud subscriptions, Microsoft 365, Azure, Dynamics 365, and Windows 365 among them, via a partner rather than directly from Microsoft.
Why CSP matters in a Microsoft estate
CSP matters because Microsoft estate decisions often have a commercial owner as well as a technical owner. Clear cost, licence, and partner language helps teams prove value, reclaim waste, and agree the next action before spend becomes harder to challenge.
How CSP shows up in practice
That partner handles billing, provisioning, and a defined level of ongoing support as part of the relationship. The programme has a tiered structure. An Indirect CSP reseller sells through an Indirect Provider that holds the direct billing relationship with Microsoft and takes on much of the operational and technical infrastructure, while a Direct CSP partner bills the customer itself and carries a correspondingly higher bar of Microsoft-set competency and support requirements. The distinction genuinely matters to a customer because it shapes who they actually escalate a billing or licensing issue to, and how much flexibility exists in adjusting a subscription outside a renewal cycle.
Compared with an Enterprise Agreement, CSP billing is typically monthly rather than committed to a multi-year term, which in principle gives customers more flexibility to adjust licence counts and mix as needs change. That flexibility is genuinely useful only if the customer, or their CSP partner on their behalf, actually monitors usage and acts on it, since CSP's monthly cadence does nothing by itself to prevent an organisation quietly accumulating unused or oversized licences the way annual, less frequently reviewed agreements often do. This is precisely where licence visibility and cost-optimisation tooling earns its keep in a CSP relationship. Identifying inactive accounts, oversized SKUs, and licence types that no longer match actual usage turns CSP's monthly billing flexibility into monthly cost savings, rather than a theoretical advantage that goes unrealised because nobody is reviewing consumption between renewals.
It is also worth being precise that a CSP partner and a Managed Service Provider are related but distinct roles that are frequently, though not always, held by the same company. CSP describes a licensing and billing channel relationship with Microsoft specifically, while MSP describes a broader IT service delivery model that may or may not involve reselling Microsoft licensing at all. Understanding which hat a given partner is wearing in a specific conversation, licensing reseller, technical support provider, or both, matters when working out who is actually accountable for a specific cost, configuration, or support issue.