vCard Usage

Is there a way to find out which mailboxes are sending vCards automatically with outgoing messages other than manually checking each mailbox? I recently added our staff photos to GroupWise and it was discovered that the image will attach itself to the employee's vCard, and they feel that they are at some sort of risk if their pictures are provided in their vCard. Is there a way to identify who is using this from a central location rather than checking each mailbox? Thanks!