If your subscription expires, or was disabled by Microsoft, or if you cancelled it in the middle of a subscription term, you can reactivate it in the Office 365 admin center.
Not an admin? Contact your administration to reactivate your subscription.
In the Admin center, go to the Subscriptions page, or choose Billing > Subscriptions.
If you're using Office 365 Germany, go to this Subscriptions page.
If you're using Office 365 operated by 21Vianet, go to this Subscriptions page.
Choose the subscription that you want to reactivate, then choose Reactivate.
If you don't see Reactivate as an available action, call Support to reactivate your subscription.
Enter your payment details. You can update your existing payment information here.
If your subscription was expired, then after you submit your payment details, your subscription returns to an active state, and the Next billing date extends by either one month or one year, depending on your current subscription commitment. If you pay by credit card or bank account, your credit card or bank account will be charged for the extension. If you pay by invoice, you’ll see the extension reflected on your next invoice. To make sure that your subscription doesn't expire again, follow the steps to turn on Recurring billing.
Note: The ability to pay by bank account isn't available in some countries or regions.
If your subscription was cancelled, or was disabled because a payment wasn't received, it returns to an active state, and your Next billing date stays the same.