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MF_E_NET_SERVER_ACCESSDENIED
MF_E_NET_SERVER_ACCESSDENIED means the origin media server refused access. It may be a credential, authorization, ACL, token, or publishing-point policy issue.
Diagnostic discriminator: Capture the identity actually presented to the origin and the authorization decision for the same URL. A successful request under a known-good credential through the same route separates server policy from DNS, proxy, or transport failures.
What to check for MF_E_NET_SERVER_ACCESSDENIED
- Confirm the identity and credential flow used for the exact URL.
- Check server authorization logs and content permissions.
- When using a Media Foundation app, provide an appropriate credential manager rather than assuming the platform supplies credentials automatically.
Microsoft: Network source authentication
Microsoft: Authentication and authorization with Windows Media Services
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