If your sign-in uses your company credentials or looks like email@example.com:
We recommend that you contact your CRM Online administrator. You have to be an administrator to contact technical support.
Web support (recommended): Sign in to your Office 365 account and then submit a web ticket
Phone: 1-800-865-9408 (North America) or Other countries
Learn more about working with Microsoft support for Microsoft Dynamics CRM Online
If you're enrolled in Microsoft Services Premier Support:
Sign in to My Premier Online