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Good morning,
I messed up when going through the Authenticator process when installing the Azure ADPasswordProtectionProxy setup.
Now when I attempt to use my admin account again I get "Cannot process argument because the value of the argument "exception" is null. Change the value of argument "exception" to a non-null value.
However, I would prefer not to create a new domain admin account to complete the setup. Is there a way to clear the error so I can register the AzureADPasswordProtectionProxy software?
Thank you in advance for your help.
Bill
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 44%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
Has your setup failed earlier ? Please try to uninstall the password protection software before running the setup again. In order to do the clean up you have to followup certain steps which is documented over here.
Just checking in if you get a chance to look into my previous response ?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(19.2, 60%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERT%3C/text%3E%3C/svg%3E)
Hey Bill,
Did you ever get that resolved? I'm seeing the same thing in our environment and am tearing my hair out trying to get past it. I have tried the removal suggestions but it made no impact for me at all.
I am having the same issue. I've validated the pre-reqs and have validated external connectivity and I receive the Exception 'null' error noted above. I am attempting to register my first proxy.
Glad to see I'm not the only one. I've tried everything to get this through and have come up with nothing. I submitted a ticket to Azure support as well so hopefully that may help figure this out.
Welp, I still don't have a fix, but I figured I would pass along (if you didn't know already), there is a proxy registration log that shows the registration process and in our case, failure. It's located under C:\Program Files\Azure AD Password Protection Proxy\Logs.
Good to know...didn't check that yet! I am showing this error under ProxyService in the Event Log. No fix yet either on our side, but support did just respond to me to gather more information so I'm hopeful.
A proxy registration message was sent to Azure but an http failure was received.
Http failure code: 400
Elapsed time (msec): 1428
Endpoint: https://enterpriseregistration.windows.net/aadpasswordpolicy/xxx
This error may be expected if network connectivity to Azure is unreliable. Ensure that this machine has network connectivity to Azure.
Additional information may be available at https://aka.ms/AzureADPasswordProtection
Same issue occuring here too -
15:28:07.713 - INFO - snipped-48e9-84cc-62f2344801d2 - HttpUtility: Calling server url:'https://enterpriseregistration.windows.net/aadpasswordpolicy/bc4950a3-9a6d-4ca5-bb3f-snipped/proxy?api-version=1.0&traceid=snipped-48e9-84cc-62f2344801d2' proxy:System.Net.WebRequest+WebProxyWrapper proxyUri:https://enterpriseregistration.windows.net/aadpasswordpolicy/bc4950a3-9a6d-4ca5-bb3f-snipped/proxy?api-version=1.0&traceid=snipped-48e9-84cc-62f2344801d2
15:28:08.074 - VERB - snipped-48e9-84cc-62f2344801d2 - HttpUtility: GetHttpResponse: caught web exception: System.Net.WebException: The remote server returned an error: (400) Bad Request.
When I attempt to connect to the url by hand I do connect but also receive an error message (to be expected as my browser didn't prompt for cred's.
Good to know Andy! Still no luck yet but I'm working with Azure support to see if we can figure it out. Submitted all errors to them to look at. I let them know about this thread as well. Case #: 20001376 if any of you need it if you have your own support requests.
Sorry for the late response. The only way I was able to get around it was to create another account and start the install again. This time it succeeded. I wasn't keen on creating a new account to do it but it worked in the end.
Bill
Which account did you create? Your Global Admin account? That did not work for me.
Thanks Bill! I had tried that as well but got the same error. It is comforting to know that others are seeing this too though. Hoping support can help pinpoint it.
Just got off the phone with support - agreed it looks like a backend issue not a client side configuration.
Software hasn't been updated since March 2019 so it's not like a new version got pushed out (although this is the first time I've tried to install this software).
My case ticket is 20023148
We've tried 2 existing GlobalAdmins and also created a new one. Security Defaults is off (for now), MFA is off for testing - no difference. Creds are getting accepted as the message only returns after the device code id has been successfully entered.
I'm in the same boat Andy. Hoping they can drill down to the root cause!
Thanks Andy! Appreciate the info.
I was just able to run the Register-AzureADPasswordProtectionProxy successfully without error. Looks like maybe things are working now!
Worked for me too! Looks like they got something figured out. Awesome! Thanks everyone for jumping in on this thread!
I can confirm it works for me too. I'll let MS know. Would be curious as to what happened.
Same Andy. I'd be curious as well. My support tech wasn't sure what would have changed and had no notes as to any. Odd.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 63%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGE%3C/text%3E%3C/svg%3E)
I have the same Problem. -------------- Register-AzureADPasswordProtectionProxy : Cannot process argument because the value of argument "exception" is null. Change the value of argument "exception" to a non-null value. At line:1 char:1 + Register-AzureADPasswordProtectionProxy -AccountUpn "Gerrit.ellmer.ad ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [Register-AzureADPasswordProtectionProxy], PSArgumentNullException + FullyQualifiedErrorId : UnhandledCmdletException,Microsoft.AzureADPasswordProtection.Powershell.Commands.Registe rProxy -------------- It's an Server 2019 (1809) fully patched with no 3rd Party Security Software. Microsoft Visual C++ 20015-2019 Redistributale are installed The Server has direct internet Connection without any Proxy The Server is Hybrid Joined My Account is an: - onPrem Enterprise Admin - Global Azure Admin - local Admin on the Member Server Conditional Access and Azure Identity Protection is temporally disabled for this specific Account The Version of the Azure AD Password Protection Proxy are 1.2.125.0 What i have done/tested: - reboot system - Run the Powershell as admin / as System / as User - uninstall and reinstall the Service Proxy - remove and re-import the Powershell Module What i see at the EventLog:![8142-aadpasswordprotectionproxy-register-error.png][1] [1]: /api/attachments/8142-aadpasswordprotectionproxy-register-error.png?platform=QnA
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(214.4, 81%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMT%3C/text%3E%3C/svg%3E)
Just checking in to see if you had a chance to look into Saurabh's previous response, As Saurabh mentioned, please try to uninstall the password protection software before running the setup again. That error is sometimes related to wrong file paths so something may have gone wrong with the save folder for the installation.
I would also recommend checking the connectivity troubleshooting in the guide:
https://learn.microsoft.com/en-us/azure/active-directory/authentication/howto-password-ban-bad-on-premises-troubleshoot
Still not with me, unfortunately :( Also with the switch for the device code does not lead to success. It remains with the![8353-aadpasswordprotectionproxy-register-deviceswitch-p.png][1] HTTP 400 Bad Request Error. You can see it in the Screenshot from the Registration Log. [1]: /api/attachments/8353-aadpasswordprotectionproxy-register-deviceswitch-p.png?platform=QnA
anonymous user Did you try creating a support case for this issue.