Credits not added to microsoft account

If it's a credit for the microsoft Store he could try buying a card from them. Otherwise if it added the credit as part of his Microsoft account balance, it would not be possible. That credit can only be used for digital content.

When the credits are added to your account, they are added as a currency to your Microsoft account balance. You would choose your balance as a payment option when you make a purchase in the Xbox store.

Keep in mind that the payment method they are looking for is a Microsoft account balance. A credit card or Paypal would not be what they are looking for. If you've never added an Xbox gift card to your account, you would need to do so in order to open a
Microsoft account balance so they can deposit your credits.

When credits are deposited, they are added as currency to your Microsoft account balance (same as if you added an Xbox gift card to your account). When you make a purchase on the Xbox store, you would choose your account balance to make purchases.

Microsoft Points can take up to 48 - 72 hours to process and be added to your account. You also need at least 100 points to be credited into your account, Points are only credited into your account on the 15th and 1st of every Month. Be patient and they
will arrive,