Global.asax, Session_Start HCAD - Online Agent Services Tuesday, 03/28/2017 Online Agent Services Session Expiring! Your Session will expire in seconds. Do you want to continue working in Online Agent Services? Reset Password Agent Number: Security Question: Security Answer: Please supply an Agent Number and Enter or Tab over to Security Answer box. Thank You for visiting the Harris County Appraisal District. ©2005-2017 : All Rights Reserved Session Idle: seconds.