Microsoft Advertising: unexpected Xandr billing documents after migration

Microsoft reports on its Advertising Platform Health page that some customers migrating from Xandr billing received unexpected Xandr invoices or other billing documents for September activity. Microsoft's published instruction is to hold off on any action on those unexpected documents and to contact support. The latest update seen for this review is dated 9 October 2026; a subsequent resolution could not be confirmed.

Impact

Medium impact for affected accounts: finance teams risk paying or booking duplicate or incorrect billing documents. Valid invoices unrelated to the migration are not concerned.

Recommendations

Flag any unexpected Xandr billing documents for September activity to finance before processing them.
Reconcile those documents against Microsoft Advertising billing.
Obtain confirmation from Microsoft support before paying or booking them.
Check the Platform Health page for a resolution update.

Source: Microsoft Advertising Platform Health