Can I transfer my Microsoft licenses from one CSP partner to another?

Yes — this is a supported process called changing the "partner of record." Your new partner initiates a relationship request, and you approve the transfer through the Microsoft admin portal. Your licenses, Azure resources, and tenant remain entirely yours throughout.

It's generally a smoother process for per-seat products like Microsoft 365; Azure resources under an Azure Plan can also move, though it's worth planning the transition with both partners to avoid any billing gaps.