Migrate Azure function app from consumption plan

If you have your function app running on a consumption plan and ever considered to move it to a different plan then this may have stopped you

Being greyed out does not mean it is not possible, only that there is not yet any portal support for it. But luckily this is possible using PowerShell. The easiest way to achieve this is likely to start the Azure Cloud Shell (top bar in the portal)

The shell will pop up in the bottom of the browser. Where it reads Bash, click and select PowerShell.
First we need to select the relevant subscription (you are already logged in). If you only have a single subscription in your tenant, skip this step.
The subscription id is what follows /subscriptions/ in the browsers url, ex.

https://portal.azure.com/#@mytenant.onmicrosoft.com/resource/subscriptions/9734191f-63d9-4b3d-880e-8de9a40942f2
/resourceGroups/rgfuncapp/providers/Microsoft.Web/sites/funcapp/appServices

Copy this value and enter (paste using mouse right click)

Select-AzureRmSubscription -SubscriptionId your_subscription_id

Before continuing make sure you have a new plan (the one you wish to move to) in the same resource group and in the same region.

To move you need just a single command

Set-AzureRmWebApp -Name "[function name]" -ResourceGroupName "[resource group]" -AppServicePlan "[new app service plan name]"

You need to reload the browser before you see the change in the portal.

Please refer to https://github.com/Azure/Azure-Functions/issues/155 for further details. As you may notice this blogpost is simply elaborating on a comment made on the issue, but it took me a while to find that, so hopefully this helps someone while we wait for portal support.