What is this weird contact folder appearing, and just containing me?

Either eMClient or something else is adding a new contact folder along with my main Outlook Contacts.
Under my Contacts, I have two accounts, both named with me@myemailaddress. Under one is the usual Contacts folder from my MS Exchange Server. Under the other (same address) is one called ocsou498732GAL. In it, is just one entry - me. I’m not in the habit of putting myself in my own contacts list, so how did it get there and why does it need a new “folder”. I tried deleting it, but just get this message “Deleting the folder failed due to the following error: Specified method is not supported” in a Windows Modal dialog box.

Who put this here, and how can I get rid of it ?