You need to login admin center update an existing credit card or bank account. The preview is available to all Microsoft 365 admins, you can opt in by selecting Try the preview toggle located at the top of the Home page.
- In the admin center, go to the Billing > Payment methods page.
- On the Payment methods page, pick the credit card or bank account to update.
- To change the credit card or bank account information, choose “Edit payment details” to update credit card Microsoft account.