What is the OneDrive Attachments folder?

Legacy Collaborate has now been superseded by New Collaborate. 

While users will still be able to select the Default Email Template and share links with clients, all other configuration settings have been disabled. 

To upgrade to New Collaborate, refer to Upgrading to New Collaborate.

Issue
Some of our users have an Attachments folder in their OneDrive.

Cause
FYI is not creating this folder. It appears to be created if you select to upload an attachment to OneDrive from Outlook, or if you login from the OneDrive mobile app.