Microsoft Remote Desktop Error( 0x204)

So I figured this out. A hint is when you try to connect using mstsc to Linux..

It warns the connection is insecure, and to make it secure, you need to enable RDSTLS. It's only a warning, so with the Windows client, you can click 'continue'; the Apple Mac version is more sniffy and just drops the connection

So you have to create an RDP file and add "use redirection servername:i:1" - save the RDP file and off you go. Both the Windows and Apple Mac clients are very intolerant of sending a bad password - it just stops and unloads the client, rather than prompting for N times.

Here's my sample RDP file I used to connect to Rocky 10...

Yup. 2026 and we still editing text files and finding comptablity across platforms a challenge - everything changes - and stays the same in equal measure...

screen mode id:i:2

use multimon:i:0

desktopwidth:i:2560

desktopheight:i:1282

session bpp:i:32

winposstr:s:0,1,1516,398,2316,998

compression:i:1

keyboardhook:i:2

audiocapturemode:i:0

videoplaybackmode:i:1

connection type:i:7

networkautodetect:i:1

bandwidthautodetect:i:1

displayconnectionbar:i:1

enableworkspacereconnect:i:0

remoteappmousemoveinject:i:1

disable wallpaper:i:0

allow font smoothing:i:0

allow desktop composition:i:0

disable full window drag:i:1

disable menu anims:i:1

disable themes:i:0

disable cursor setting:i:0

bitmapcachepersistenable:i:1

full address:s:192.168.1.86

audiomode:i:0

redirectprinters:i:1

redirectlocation:i:0

redirectcomports:i:0

redirectsmartcards:i:1

redirectwebauthn:i:1

redirectclipboard:i:1

redirectposdevices:i:0

autoreconnection enabled:i:1

authentication level:i:2

prompt for credentials:i:0

negotiate security layer:i:1

remoteapplicationmode:i:0

alternate shell:s:

shell working directory:s:

gatewayhostname:s:

gatewayusagemethod:i:4

gatewaycredentialssource:i:4

gatewayprofileusagemethod:i:0

promptcredentialonce:i:0

gatewaybrokeringtype:i:0

use redirection server name:i:1

rdgiskdcproxy:i:0

kdcproxyname:s:

enablerdsaadauth:i:0

i found an easy way that i just turned on "Connect to an admin session" on the configure page

So iIfaced this error and this worked for me: The issue was my VPN was somehow blocking the port 3389 that allows RDP to connect. Considering this was my company's VPN, I had to work with them to unblock this policy. Hope this helps. All the best.