We are using, NLA, yes..

I’ll have to look into this more.

On possible fairly easy thing would be to maybe just add additional logic / 
information into the error msg thrown by guac to give the admin addt’l clues as 
to what may be the issue.




Thank you,

Brad Turnbough
Senior Technology Analyst

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From: Nick Couchman <[email protected]>
Sent: Monday, January 27, 2025 11:46 AM
To: [email protected]
Subject: Re: RDP Connection using an account with a password set to 'user must 
change password at next login'

On Mon, Jan 27, 2025 at 12:08 PM Brad Turnbough 
<[email protected]<mailto:[email protected]>> 
wrote:
Guac gives us a message about the RDP connection being denied, but doesn’t 
provide the reason why.

Upon further investigation, the AD account password was set to ‘change at next 
logon’.

Once we disabled that, we were able to login without issue.

Is this a known issue, a bug, or something that I need to report via the proper 
means/measures?


My recollection of this issue is that it's a known issue with RDP + NLA, in 
general, and not something specific to Guacamole. I believe it has to do with 
the way that NLA works - the authentication happens as part of the connection 
step, prior to the ability to actually interact with the Windows interface. 
This means if something like a password expiration or forced password change is 
required for the account it will not be possible to log in with RDP.

If your experience differs and you're able to successfully connect with 
something like Microsoft Remote Desktop client or xfreerdp with an account in 
the above state, feel free to reply and tell me I'm wrong :-). I'm going off 
past experience/memory, here.

-Nick

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