Delete all the Azure Storage Blob content before N days using Logic App

faldana I think you will get the nextmarker value in response if you have more than 5000 blobs. you can pass this value again with list blob until you stop getting that parameter. That's one way to deal with that. That;s how even SDK works in the background. 

Second and easy way is to use the Life cycle management policy which is inbuilt in Azure portal and you can achieve the same there

https://docs.microsoft.com/en-us/azure/storage/blobs/storage-lifecycle-management-concepts?tabs=azure-portal#add-or-remove-a-policy