A new section has been added to an existing call center, including new desks, computers, and telephones. Some of the call center agents in this new area are trying to log into Proactive Contact and…

A new section has been added to an existing call center, including new desks, computers, and telephones. Some of the call center agents in this new area are trying to log into Proactive Contact and receive the error. "Invalid headset ID." Call center agents in the older section of the call center are working fine. The Communications Manager indicates that the new section has new extensions.Which file should be reviewed to determine the problem?