This article explains how to resolve a rare error that occurs when CloudM Migrate cannot communicate with the CloudM licensing platform.
1. Symptom
During a license check or at the start of a migration, the process fails with the following error message:
Migration Failed: Unable to validate license, unable to query license server. The remote server returned an error: (500). Internal Server Error.
This indicates that the server running CloudM Migrate was unable to connect to or get a valid response from the CloudM license validation service.
2. Cause
This error is not caused by a problem with your license itself. Instead, it points to a network connectivity issue between your migration machine and the CloudM licensing platform, which is hosted at https://tracker.cloudm.io.
The most common causes are:
-
Firewall Rules: Your corporate firewall is blocking outbound HTTPS (port 443) traffic from the migration server to
tracker.cloudm.io. -
Network Proxy Issues: The migration server is configured to use a network proxy that is not correctly configured or is actively blocking the connection.
-
DNS Resolution Failure: Your local network's DNS server is unable to resolve the IP address for
tracker.cloudm.io. -
Temporary Platform Unavailability: In extremely rare cases, the CloudM licensing platform itself may be experiencing a temporary issue.
3. Resolution
To resolve this issue, you must ensure your migration server can successfully communicate with https://tracker.cloudm.io over HTTPS.