To view the buyer limit criteria details, click its record or select View record from the Actions menu next to it, its details are displayed as shown in the below example:

Criteria attributes are displayed along with their values, target and limit quantities, and status, etc.

Go to Notification users tab to view the list of buyer users assigned to the criteria as shown in the below example:

Users are listed along with the email, status, and updated date. To assign a new user, click the button, the following window appears:

You can delete any of the users by clicking (x) next to it, or start typing the user name to add it, then click Save.