Altiris will not start on our package server

Products

• Client Management Suite
• IT Management Suite

Issue/Introduction

The Symantec Management Agent service was not started. Tried to start it manually, but got "Error 2: The system cannot find the file specified."  Rebooted server, no change.  Confirmed that Program Files were present, and also tried to start from the command line using AexAgentUtil.exe /start, but that did nothing. 

Environment

Release: 8.6

Cause

AeXNSAgent.exe was missing from the Altiris Agent folder

Resolution

Copied AeXNSAgent.exe from another managed computer at the same agent version.