What Microsoft permission does it need?

One read-only application permission, LicenseAssignment.Read.All, granted by admin consent in each client tenant.

Does it change anything in Microsoft 365?

No. It only reads license counts.

Microsoft 365 license reconciliation

The revenue check runs plain rules over data your workspace already has and lists each gap with the client, the evidence and what it is worth.

More licenses in the client’s tenant than a seat line last recorded.

More devices in your RMM than a per-device line bills.

A metered line whose count is more than 35 days old.

Approved billable time over 30 days old that is not on an invoice.

Entries waiting more than 14 days for approval.

Work continuing after a client’s only agreement ended, or for a client with none.

Update the line to the count found; the change is recorded with its reason.

Store Microsoft’s count on a metered line with the date it was seen.

Opcrunch reads from Microsoft and your RMM and never writes back.

What Microsoft permission does it need?: One read-only application permission, LicenseAssignment.Read.All, granted by admin consent in each client tenant.
Does it change anything in Microsoft 365?: No. It only reads license counts.

Every module in one tier, with unlimited clients and free portal users.