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hps_stevea
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V13 Dollar ($) in username no longer supported

Post by hps_stevea » 1 person likes this post

In case anyone else gets this error, we recently upgraded to Veeam 13 and found no administrator users could sign in

We prefix our admin accounts with "adm$", a valid login name on Windows. However we receive this error on sign-in:

Image
"Cannot find user '<sid>' account"

We also receive a similar error when logged into the server directly and choose to sign in as the currently logged in user.

We have had to create new admin accounts for Veeam
david.domask
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Re: V13 Dollar ($) in username no longer supported

Post by david.domask »

Hi hps_stevea,

I'm not aware that this is an intended limitation; error messages should either be handled more gracefully or investigated as technical issues.

Please open a Support Case and let Veeam Support review the behavior. Be sure to include logs for Support to review.

I can imagine perhaps what's happening in the background, but typically such intentional limitations are handled with proper error messages instead of what looks like a Windows error bubbling up into the console.

Please share your case number once created. Thanks!
David Domask | Product Management: Principal Analyst
hps_stevea
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Re: V13 Dollar ($) in username no longer supported

Post by hps_stevea » 1 person likes this post

I have reverted my admin account name back to adm$, recreated the issue and raised a support request. Case #07946559

[Moderator: Replaced Support ID with Case Number]
Rumple
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Re: V13 Dollar ($) in username no longer supported

Post by Rumple »

I suspect the problem is because accounts that end in $ are typically machine account's so they added filtering to reduce the listing to just users.

User accounts ending with a dollar sign ($), also known as “hidden accounts,” are designed to imitate machine accounts typically found in AD environments.

I've personally only found malicious actors using $ at end of name to try and bypass monitoring and security solutions and I believe that was one of the big Active Directory patches in last few years because it was causing AD to treat users with a $ as a machine account and giving that account elevated permissions. I just can't remember the details.

I would never recommend admin accounts have a $ at the end personally.
hps_stevea
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Re: V13 Dollar ($) in username no longer supported

Post by hps_stevea »

Thanks Rumple, I understand where you are coming from.

For clarification, the accounts are prefixed with "adm$", so their account names are like "adm$john.smith".

It isn't a big deal, we keep Veeam separated so its not on the domain, therefore we can rename the accounts or create new ones on the Veeam B&R server.
david.domask
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Re: V13 Dollar ($) in username no longer supported

Post by david.domask » 1 person likes this post

hps_stevea wrote: Jan 12, 2026 10:38 am I have reverted my admin account name back to adm$, recreated the issue and raised a support request. Case #07946559

[Moderator: Replaced Support ID with Case Number]
Support confirmed this is a known issue that has been reported to our RND team, planned to be fixed in a future release. Thanks for reporting the issue hps_stevea.
David Domask | Product Management: Principal Analyst
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