Outlook and picture attachment issue

I have a client who used Apple Mail, but was "strongly advised" to use Outlook by the technician who follows the website and all the IT part of the company.

Having been used to Mail for over 10 years, she is now troubled and I also have problems with the photos I am sending her as attachments.

What happens in Outlook is that, unlike Mail, if you drag & drop an attached photo on the desk, the title becomes "unknown1.jpg", and the following ones are all “unknown” with progressive numbers. In this way it is not possible to archive them, I cannot know among (I give an example) three drafts that I sent her which one she have chosen, because the titles do not match.

He cannot use them to insert in some Albums in Photos for the same reason, lacking the indications on the original number or the title or the date that I write in the titles.

I also searched in Outlook for a function to save attachments to a folder, just like there is in Mail, but I couldn't find it.

Yes, I can also send the pictures by Wetransfer, or make zipped folders, but I find it absurd that an application as Outlook for Mac does not behave as it should on Mac.

Is it possible that whoever makes a mistake is I who use Mail that notoriously sends only "embedded" attachments, and Outlook does not "understand" this type of attachment?

Is there a system to solve?

Diego (from Italy)