If you ever have any questions or issues with your Office 365 system, Microsoft has a responsive and knowledgeable support team. To get support for Office 365 or Dynamics 365 Online, navigate to the Admin Center page in the Office 365 Portal, and click on New Service Request on the Support tile in the Office 365 Admin Center dashboard. From here, you can create a new request and specify the details of your issue. A Microsoft engineer will contact you shortly (typically the same day, and often times within minutes) to help you with your issue.
For creating a service request ticket with the Office 365 team via phone, simply dial 1-800-865-9408. Note: This number is only for United States Office 365 clients.