WordPress has the ability to upload images directly to a post, but there may be times when FTP of a large number of images is more expedient.

MEDIA FROM FTP is a handy plugin that will add any unknown images to the WP media gallery where they can be inserted into articles as needed.

This tool can also help find orphaned images from errors or old posts that were deleted. It can also recover images with there is an error with the host. Azure, like all web hosts, have the occasional errors with transfers.

When all the images in the upload folder they  will be available for use. Lots of tools are available for WP and this one is one of the handiest.