If the Network Time Protocol (NTP) source that Azure Stack Hub is pointed to must be changed, perform the following steps:

• Connect to the Privileged Endpoint (PEP) to update the time server for Azure Stack Hub.
• Modify the switch Access Control List (ACL) rule s on the BMC switch for NTP.
• Update the NTP server on the switches.
• Update the NTP server on the Hardware Lifecycle Host (HLH).