Your company is planning to use the Azure App Service (PaaS) to host its set of web applications. As part of the App Service plan, does Microsoft automatically provide professional services and customizations to applications hosted in Azure Web Apps?

Answer options:

A.Yes
B.No

Answer – B 
For any sort of professional services, you have to buy the appropriate support plan separately. It does not come as part of the App service plan. 
For more information on the support plans, please visit the below URL- 

https://azure.microsoft.com/en-us/support/plans/