Hi Tammy !
Thanks again for getting back to me with an answer ! ;-)
As you suggest, in d365f I change my region from Français (Canada) to English (Canada). I already use Excel in English version, but my Windows 10 are in French...
This morning, I perform some tests with others tables (Vendors, Contacts) and they can Edit in Excel without any problems...
It seems to be a problem with the Customers table only... and I have the same result that in all companies of this environment.
Let me know if I can give you others informations.
Best regards,
Christian