Unable to Select Existing Service Plan

Question

We're trying to consolidate our app services onto less app service plans. They're on the same subscription, same region but when you select to change and select the new resource group, no service plans are listed even though there is one in that resource group.

Answer 1

Hello @Nichesoft Admin

Thank you for reaching out. I see that you’re trying to consolidate your App Services, but the App Service Plan you want isn’t showing up when you try to change plans, even though it’s in the same subscription and region.

This is expected due to a webspace limitation in Azure App Service. Apps can only move between App Service Plans created in the same webspace, which is set by the resource group, region, and OS (Windows/Linux) at creation. If a plan was created in a different resource group and moved later, it keeps its original webspace, so it won’t appear as an option.

Recommended solution: Create a new App Service Plan in the same resource group, region, and OS as your source app, then move your apps to this plan. This will ensure everything is in the same webspace and allow consolidation.

Reference:

Manage and move App Service Plans: https://learn.microsoft.com/en-us/azure/app-service/app-service-plan-manage?tabs=asyncscaleout

Solution:

The only option is to re-create the app services in the chosen app service plan due to webspace limitation as explained.

Kindly let us know if the above helps or you need further assistance on this issue.

 

Please "upvote" if the information helped you. This will help us and others in the community as well.

Answer 2

Hi,

In order for you to be able to switch a web app to a different App Service Plan (ASP), the destination ASP needs to have been originally created in same region and resource group and OS as the source. In other words, the underlying webspace that source and destination ASP are in must be the same.

If you can't switch a web app to different ASP due to above limitation you will need to re-create the web app in the target ASP. For windows web apps you can use the Clone App feature to help with this.

Move an app to another App Service plan

https://learn.microsoft.com/en-us/azure/app-service/app-service-plan-manage?tabs=asyncscaleout#move-an-app-to-another-app-service-plan

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP

Answer 3

If you are unable to select an existing App Service plan while trying to consolidate your app services, ensure that the following conditions are met:

1. Same Resource Group and Region: The source and target App Service plans must be in the same resource group and geographical region. If the existing service plan is in a different resource group or region, it will not be listed.
2. Same OS Type: Both App Service plans must be of the same operating system type (e.g., both Windows or both Linux). If there is a mismatch in the OS type, the plans will not be selectable.
3. Webspace Considerations: Azure deploys App Service plans into deployment units called webspaces. Ensure that both plans are created in the same webspace, which is determined by the combination of resource group, region, and OS type. If the existing plan is in a different webspace, it will not be available for selection.

If you confirm that all these conditions are satisfied and you still cannot see the service plan, consider checking for any additional restrictions or errors that may be affecting the visibility of the service plans in the Azure portal.