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SPLA to CSP Migration

What Changes for Hosters Under CSP

PUBLISHED NOVEMBER 12, 2025 · UPDATED APRIL 22, 2026

Moving from SPLA to CSP is more than a billing swap. Here is what actually changes for a hosting business, and where the lookback still bites.

Many hosters are weighing a move from SPLA to the Cloud Solution Provider model. The two programs solve the same problem in different ways, and the change is more than a billing swap. This top of funnel article explains what actually changes for a hosting business under CSP, so you can plan the move without losing compliance or margin.

Two ways to license the same software

SPLA is a monthly pay as you consume program where you report usage and carry the compliance obligation across a 36 month lookback. CSP is a subscription and license model where you transact through the Microsoft partner channel and provision per customer. Under SPLA you measure and report. Under CSP you assign and manage subscriptions. The mental model is different, and so are the failure points.

What changes operationally

SPLA and CSP side by side

DimensionSPLACSP
Commercial modelMonthly pay as you consumeSubscription through the channel
Compliance focusEvery month across 36 monthsCurrent assignment and entitlement
Core disciplineMeasure, map, report, sealAssign, track, reconcile
Audit lookback36 month windowCurrent state with history checks

The trap during the change

The risk in any migration is the overlap. While both models run, usage can be reported twice or fall through a gap and be reported nowhere. Your SPLA obligation does not end the day CSP begins, because the lookback still covers the months you were on SPLA. Plan the cutover so every month is owned by exactly one model and nothing is left unmapped.

Move from a position of evidence

A migration is a good moment to clean up, but only if you start from accurate records. Hosters who enter the change with disciplined SPLA reporting and current customer mapping carry that evidence forward and protect themselves against a backward looking audit. Those who treat the move as a fresh start often discover the lookback does not agree.

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