Hello Zhang   You can refer the following article for offline update process.   https://www.cisco.com/c/dam/en/us/td/docs/security/amp_threatgrid/threat-grid-appliance-offline-update-process.pdf   Regards Jetsy

Hello Zhang   I have recently come across a similar issue and as Matt suggested the error will be mostly caused by network level block. Most of the time we just allow the traffic in firewalls for the upgrade server and it should work but if you have ...

Hello phonehome   As a quick step to check the successful communication, you can try running the following from any of the endpoint cmd.   C:\Program Files\Cisco\AMP\X.X.X\connectivitytool.exe   Once you run the script, it will generate a log file wh...

Hello  phonehome   After the reboot, does it reflects the latest connector version and is the connector status is still showing as connected or disconnected in the endpoint?A diagnostic support file from any of the endpoint would be helpful to verify...