Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Paul Beedham,
It sounds like the renewal may have failed after the bank account changed.
Please sign in to Services & subscriptions, check the Microsoft 365 status, and update the payment method under Manage. Also make sure the billing address and region match the information held by the bank.
If the renewal still shows Unknown Error, please contact Microsoft Support.
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