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Test Password for managed accounts failing

  • February 19, 2026
  • 2 replies
  • 51 views

Hello everyone.

 

In managing accounts in our environment, I've identified some accounts that fail during password testing.

 

"Error[9] - code: 49, error: The supplied credential is invalid.

The password for 'ACCOUNT' on domain 'DOMAIN' is invalid..."

 

What I've identified is that this is caused by the account only being able to log in on two devices on the network, defined in the "Log on to..." option of Active Directory.

Removing any device from this list makes the test work correctly.

This makes sense because the password test is simply a login to a Domain Controller to validate if it's correct.

 

Now comes the question... Is there any way to make this password test work even with devices listed in Log on to...?

The only way I thought of would be to add the domain controller to the "Log on to" list. But then I would have to add all the Domain Controllers in our environment or limit it to a single Domain Controller that this account will be managed on, right?

 

Has anyone else experienced this?

 

Regards,

Rudolf

Best answer by KevC

In our environment we needed to add the Brokers to the allowed ‘Log on to’ computers list. 

2 replies

  • Apprentice
  • Answer
  • February 27, 2026

In our environment we needed to add the Brokers to the allowed ‘Log on to’ computers list. 


  • Author
  • Rising Star
  • March 2, 2026

@KevC, you nailed it!

Thanks for the tip, and after reading it I realized how much my previous thinking didn't make sense.

The test login is being done on the RBs and not the DCs.

Adding the RBs to the Log on to password tests made them work correctly.

 

Thank you for your help.

Rudolf.