MDB - add resource provider prereq.

Author: RoseHJM

articles/dev-box/quickstart-configure-dev-box-service.md

@@ -41,6 +41,7 @@ To complete this quickstart, you need:
   - Microsoft 365 Business Premium
   - Microsoft 365 Education Student Use Benefit
 - If your organization routes egress traffic through a firewall, open the appropriate ports. For more information, see [Network requirements](/windows-365/enterprise/requirements-network).
+- Register the *Microsoft.DevCenter* resource provider. For more information, see [Register resource provider](/azure/azure-resource-manager/management/azure-services-resource-providers#developer-tools-resource-providers).
 
 ## Create a dev center