* Requires Microsoft Phone System license. ** Unlimited calling plan accounts are subject to an aggregated account limit not exceeding 3,000 minutes of use per user per month (pooled), during each monthly billing cycle for incoming and outgoing local and long-distance calls anywhere in calling areas specified in the plan description. Dial-in audio conferencing option is available at additional charge of $5 per user per month. Contact us for complete details. All plans require a Microsoft 365/Office 365 subscription that includes Microsoft Teams. It’s an add on subscription for up to 300 users and can’t be used on its own. Enterprise (300 or more users), please contact us.