Sign in to Services & subscriptions with your Microsoft account. If you have more than one Microsoft account, make sure you're signing in with the one that applies to the subscription you want to set up recurring billing for.
Select Turn on recurring billing and then follow the instructions.
If you don't see this option, that means your subscription already had auto-renew turned on.
If your subscription has already expired, a link to Renew might be listed next to it. If you don't see Renewnext to the expired subscription, you can buy a new one at Microsoft Store.
To set up recurring billing for a subscription with a prepaid card or code, select Payment & billing under the subscription and then select Redeem a card or code. The option to Redeem a card or code may be located under Manage.
When you're done, we'll send an email confirming recurring billing. If you don't see it in your inbox, check your junk mail or spam folder.
When you make changes, consider how long ago you started your subscription. Subscriptions purchased within 30 days and those purchased more than 30 days ago have different guidelines for cancellations or billing changes. These guidelines apply to all Microsoft subscriptions, including Xbox Live and Office 365. See Cancel or turn off recurring billing for a Microsoft subscription