After upgrading from 7.6 HF5 to 7.6 HF7 the agent on the NS cannot connect to send basic inventory or receive configuration updates
Operation 'Head' failed.
Protocol: HTTP
Host: <FQDN_NS_NAME>:80
Path: /Altiris/NS/Agent/CreateResource.aspx
Http status: 403
Id: {B82091E9-D849-4BBA-A12F-B072FCE5376B}
Error type: HTTP error
Error result: 0x80042D21
Error code: 0
Error note: HTTP status: 403 Forbidden. Empty response content received, the remote web server is down or URL is invalid
Error message: HTTP error occured
In this case 7.6 HF5 to HF7 upgrade
Agent is attempting to connect only via http when https is required
Execute the command below from the Altiris Agent folder on the Notification Server
AeXAgentUtil.exe /web: https://<name of NS server here>