If you are using Outlook for your business or personal use, then you need to take its subscription plan in order to take advantages from its remarkable features. Whenever your subscription gets expired or it disabled by Microsoft, or if you have cancelled it in the middle of subscription conditions, then you can reactivate it under the admin center panel. For this, you can also take assistance from Outlook team members by dialing Outlook Support Number. One thing, you need to remember that, if you are not an admin, then you require contacting administration to reactivate your subscription.