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MF_E_NET_CONNECTION_FAILURE
MF_E_NET_CONNECTION_FAILURE is a connection-stage failure. It should be correlated with the lower-level socket, TLS, proxy, DNS, or firewall message that preceded it.
What to check for MF_E_NET_CONNECTION_FAILURE
- Test the same endpoint from the affected machine and user or service context.
- Check proxy configuration and whether the required transport is permitted.
- Use client logging to see the protocol and transport selected before the failure.
Microsoft: Networking in Media Foundation
Microsoft: Supported protocols for Media Foundation network sources
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