Go to Control Panel > System and Security > Windows Defender Firewall > Allowed Apps . Ensure Remote Desktop is checked for both Private and Public networks.
This specific combination typically points to a fundamental networking breakdown, routing failure, or domain-level authentication mismatch. The base code 0x3 indicates that a connection cannot be maintained or established, while the extended hex code 0x7 signals a severe network infrastructure breakdown or an authorization mismatch following structural infrastructure changes (such as UPN modifications or server overloads). Root Causes of Error 0x3 (Extended 0x7)
If direct connection works, the problem is isolated to the gateway certificate. rdp error code 0x3 extended error code 0x7
In environment structures where TLS 1.0 is disabled for hardening, legacy dependencies inside the Remote Desktop Management Service (RDMS) can crash the broker pipeline.
If the Maximum Transmission Unit (MTU) size on the network path is too large, packet fragmentation can cause timeouts. Step-by-Step Troubleshooting Guide Go to Control Panel > System and Security
Your RDP client has a valid, but now corrupted, licensing binary blob (stored in the registry) that it is trying to present to the RDP server (Windows Server or Windows Pro/Enterprise). The server looks at it, says "This doesn't match my expected format or is corrupt," and terminates the connection with 0x7 .
: Corrupted or incompatible drivers for the Microsoft Remote Display Adapter on the host machine. The base code 0x3 indicates that a connection
Try the solutions in the order presented, and you will likely resolve the error and restore your remote desktop connectivity.
Open Server Manager > Remote Desktop Services > Collections . Under Tasks , select Edit Properties > Security .