Version: 8.14.0
Operating System: Ubuntu 24.04 LTS
Platform: arm64

While working on this issue comparing root and unprivileged elastic agents, I encountered an error with the enroll command when using unprivileged agent.

Steps to Reproduce:

1. Deploy ESS v8.14.0
2. Create agent policy with system integration
3. Install fleet managed agent with the unprivileged flag sudo ./elastic-agent install --unprivileged --url=<fleet url> --enrollment-token=<token>
4. Unenroll the agent
5. Enroll the agent sudo elastic-agent enroll --url=<fleet url> --enrollment-token=<token>
6. Agent enrollment gets confirmed, but incoming data does not get confirmed
7. Agent status in fleet ui is stuck in updating
8. Running sudo elastic-agent status we get the following error

Error: failed to communicate with Elastic Agent daemon: rpc error: code = Unavailable desc = connection error: desc = "transport: Error while dialing: dial unix /opt/Elastic/Agent/elastic-agent.sock: connect: connection refused"
For help, please see our troubleshooting guide at https://www.elastic.co/guide/en/fleet/8.14/fleet-troubleshooting.html

Definition of Done

Based on discussion in the comments:

• When a user installs an Agent using --unprivileged, then tries to enroll this Agent with a privileged user, an error message with the suggestions in Actionable error message when attempting to enroll an unprivileged Agent as a privileged user #4889 (comment) is shown to the user.