Azure Blob Attachement within Dynamics 365

Hello everyone,

I am trying to link D365 to Azure Blob Storage using the app available on AppSource to our Sandbox instance. I already followed the steps provided on Attachment Management Using Azure Blob Storage documentation but still couldn't figure out what is missing. I created the account in Azure with the proper storage containers. I copied the KEY1 from Azure into Azure Storage record within Dynamics. So far nothing happens. There is a section in the guide saying that it is needed to Register plugin steps for the given event. Could that be the issue? If so, how should I do it?

Thanks

Daniel