I am using my usda.gov Box account for work. I had a box folder created that can share files with external (non-usda) collaborators. I've successfully shared the folder with many external users, but I'm having trouble sharing with one person with an icloud.com e-mail.
When I first tried to share it with him, he couldn't see the shared folder when he went into Box. There was nothing there. He thought maybe it was because he had previously had a Box folder with others at his school, so he deleted his Box account and then I tried to re-share it with him. Now when I try to share it with him it says, "Sorry, you can not invite deactivated users to collaborate."
The USDA's help desk told me they can't help me with issues with external users and referred me to this website. Any help would be greatly appreciated!