Troubleshooting initial device registration
The device is powered on but encounters errors during initial registration.
Environment 
- Datto ALTO
- Datto SIRIS
Description 
Below are potential solutions that can resolve errors during initial device registration.
Networking issues 
If the device is not checking in, the UI will display a No networking message. There may be an error that occurs and brings them back to the registration page, or the registration may appear to succeed locally, but the device still shows as unregistered via Admin & Partners. In this case, please refer to Troubleshooting check-In errors.
Reserved Username 
Administrator and admin are reserved accounts and cannot be used. Attempts to use reserved usernames should result in an error indicating the issue.
Invalid Hostname 
The device hostname must conform to accepted NetBIOS and DNS hostname conventions.
Unmounted homePool 
Please refer to Error: homePool/home/agents/[agentName] is not mounted, cannot proceed with backup for steps to resolve this issue.