Ability to incrementally create/update AppSettings & ConnectionStrings
Today if we don't provide all of the existing AppSettings or ConnectionStrings, the ones we omit are removed.
A little bit like the ARM deployment mode, add the ability to specify an Incremental & Complete mode when pushing settings. To ensure compatibility, Complete would be the default, keeping the behavior we have today. If we set the mode to Incremental, only the provided settings would be created/updated, leaving existing settings untouched.
This would be very useful in cases where we want to sync AppSettings or ConnectionStrings for resources directly in our ARM templates for only a subset of settings and/or connectionStrings from a ARM template without deleting the existing settings that are not provided.
Thanks for the suggestion, we are looking into the feature request
Azure App Service Team