Start by accessing your Triangle MLS Dashboard at https://my.trianglemls.com/ and clicking View Account.
On the lefthand menu, click on Brokerage and then click on Roster.
Click on the 3 vertical dots in the upper right corner of the agent that is to be terminated.
Choosing Terminate will remove that agent or admin from your office in Triangle MLS. Please note that for licensees you will need to contact their primary REALTOR association and NCREC to finalize their termination with your firm.