As far as I know Cloud Services is not allowed to see the content in Azure file storage due to the security concerns

@scstus 

Scott:

Are there any other configurations required?

Not as long as File Storage has been enabled properly by Cloud Services.

I recommend you just try it out. Create a new repository of type File Storage and a new document class and use that class for the new repository. Then check in a file and verify it's there by viewing it. If it works, you are good to go.

If the customer has documents stored in the database, this will require a Data migration to place the documents in the Azure Storage area

Perhaps, perhaps not. It depends on the volumes of data, as mentioned here: https://docs.ifs.com/techdocs/23r1/020_lifecycle/100_file_storage_service/fsmigtool/#alternatives

Does anyone know if Cloud Service provide access to the customer to Azure File storage area to verify documents have been checked in?

Possibly they can during an online meeting with a cloud services engineer that you need to file a ticket to get access to, but that's a guess.

Just viewing the document should be enough though.

If you make a migration using the migration tool, you should trust that things has worked if there are no errors and if you can view a few sample documents.