How to fix Microsoft Azure Backup internal error 130001

Hi, the error code 130001 from the Azure Backup (MARS) agent usually means the agent can’t reach the Backup service or fails to validate the vault credentials. It’s rarely a vault-side issue, almost always something local like outdated software, blocked HTTPS, or expired credentials.

Start with this quick checklist:

-Update the agent – Make sure you’re using version 2.0.9273.0 (July 2025) or later. Older versions break on TLS.

-Check TLS settings – TLS 1.2 must be enabled at OS level.

-Test HTTPS connectivity – Use Test-NetConnection to verify port 443 to Azure endpoints is open. Watch for firewalls or proxies blocking access.

-Verify proxy settings – If you don’t use a proxy, ensure the “use proxy” box is not checked during registration.

-Fresh credentials file – Download a new vault credentials file, less than 48 hours old, and store it locally (not on a network share).

-Make sure the server isn’t already registered – Check in the portal and unregister or allow re-registration if needed.

-Temporarily disable antivirus or exclude agent folders – AV can block certificate imports silently.

-Verify SYSTEM has access to MachineKeys – If access is denied, registration will silently fail.

-Check the server clock – Even 8–10 minutes of drift can break authentication.