Hello Brayden,
Based on your description, all devices are running Windows 11 Pro and joined to the same domain, and the issue is isolated to the connection from PC "A" to PC "B". Here are a few steps to help troubleshoot and resolve the issue:
1. Verify User Credentials Ensure that the credentials being used from PC "A" match an authorized account on PC "B" with Remote Desktop access permissions. Try manually entering the username in the format: DOMAIN\username or username@domain.local
2. Check Credential Manager on PC "A" Stored credentials may be outdated or incorrect:
Go to Control Panel > Credential Manager
Remove any saved credentials related to PC "B"
Retry the RDP connection with fresh credentials
3. Confirm Remote Desktop Settings on PC "B"
Ensure Remote Desktop is enabled: Settings > System > Remote Desktop
Verify that the user account is listed under allowed users
Check that Network Level Authentication (NLA) is enabled or disabled consistently across devices
4. Review Group Policy and Domain Settings
Run gpresult /h report.html on both PCs to compare effective policies
Confirm that domain policies are not restricting RDP access between specific machines
5. Firewall and Security Software
Ensure that Windows Defender Firewall or third-party security software is not blocking RDP traffic between PC "A" and PC "B"
6. Event Viewer Logs
On PC "B", open Event Viewer > Windows Logs > Security and System
Look for failed logon attempts or RDP-related errors for additional clues
If this guidance proves helpful, feel free to click “Accept Answer” so we know we’re heading in the right direction 😊. And of course, I’m here if you need further clarification or support. T&B, Domic