Whats the problem with this?
Well, it turns out that the CID can reveal quite a bit about the account owner.
(The old UI is still available, though.)
These are not the only pieces of information that can be revealed.
In addition, when you share a file on OneDrive, you get a URL that contains your CID.
(Files on OneDrive are identified by a CID and a sequence number.)
So before you share this URL with someone else, think twice.
Microsoft has not yet commented on the issue.
source: www.techworm.net
