Azure: Moving an App Service to another existing App Service Plan
Azure: Moving an App Service to another existing App Service Plan
Azure: Moving an App Service to another existing App Service Plan
Re: Azure: Moving an App Service to another existing App Service Plan
The reason why you are not able to see the other App Service Plan when you try to change the App Service Plan is due to **current limitations** in moving the Azure web app resources.
The other App Service Plan which you intend to move your Web Apps to is in another resource group with existing Azure Web Apps, which is not supported currently
[Azure Web Apps current move limitations updated 01/04/2016](https://azure.microsoft.com/en-us/documentation/articles/app-service-move-resources/)
Hope this answer your question.
The other App Service Plan which you intend to move your Web Apps to is in another resource group with existing Azure Web Apps, which is not supported currently
[Azure Web Apps current move limitations updated 01/04/2016](https://azure.microsoft.com/en-us/documentation/articles/app-service-move-resources/)
Hope this answer your question.