Transitioning from Direct Bill to Indirect Reseller

I am sharing our experience regarding transition from DB to IR started 4 months ago to understand the better approach to manage our partner centers in the future. We started transitioning from Direct Bill to Indirect Reseller in November 2025.

We currently have:
one PGA with two different associated CSP PLAs: Direct Bill PLA and Indirect Reseller PLA.

We operate with two different Partner Centers:
"first" PC used for the PGA and the Direct Bill PLA

"second" used for the Indirect Reseller PLA

At the moment, everything is working correctly, as we are actively transferring customers from the Direct Bill model to the Indirect Reseller model, Incentives for the Indirect Reseller (PLA IR) are being received correctly, designations are managed under the PGA tenant, ecc.

Regarding TTM, we exceed the 1M‑dollar requirement, but only at the PGA level, as it currently includes both DB and IR revenue. Do you know whether Microsoft requires the 1M‑dollar threshold to be met at the PGA level by combining DB and IR revenue, or if only DB revenue counts for maintaining Direct Bill status?

Our other question concerns the end of the customers migration, considering that the Direct Bill PLA will eventually become restricted or revoked.

Whether it is recommended to continue using two separate Partner Centers, first for Membership, Incentives, Designations, Earnings, and overall partner management and the second exclusively for CSP Tier-2 customer management.
Or whether you suggest alternative or better scenarios for managing the Partner Center structure once the transition is fully completed.

Tks for feedback and information.

Fabrizio