If you find this error code in either the SIP Extension status (Multimedia Configuration ► SIP Extensions) or in the Monitor trace logs, IP Office is not accepting the password being used by the virtual handset(s) configured.
It may be best to change the password so that you know it is uniform throughout IPO and Chronicall / ACR.
The passwords that need to match are the Supervisor Setting passwords for the multimedia user handset and the Multimedia configuration in the software.
IP Office Manager ► Users ► <MM Handset> ►Telephony ► Supervisor Settings
Chronicall/ACR ► Admin ► System Settings ► Multimedia Voice / Contact Center ► SIP Extensions
After the password has been recreated and all settings have been saved (and the IP Office Manager configuration changes has been merged), you will need to restart Multimedia services to trigger a new registration request with the updated credentials.
*NOTE: If the handset was using the wrong credentials previously, it is likely the extension has been quarantined or blacklisted in IPO. The IPO engineer should know to release the extension again prior to a new registration request. In System Monitor, these lists can be found in Status ► Quarantined / Blacklisted Extensions.