[Samba] Failed to convert SID to a UID for a computer

Rowland Penny rpenny at samba.org
Mon Jan 23 15:31:25 UTC 2023

On 23/01/2023 15:21, tizo via samba wrote:
> We have a couple of hosts running Samba 4.16.5 as AD DC. Besides, we
> have other hosts with Samba 4.15.5 as file servers. From time to time
> the file shares that are mounted with cifs from some Linux clients get
> stuck.
> All I can see in Samba logs on the file servers, are message like:
> check_account: Failed to convert SID
> (dom_user[SMB\host-xxx$]), being host-xxx one of the Windows computer
> client.
> Is this message normal?. Or should I set an UID manually for Windows
> computers as I do for users and groups (as idmap backend is ad)?.

That is perfectly normal, on Windows a computer is a user with an extra 
objectclass. On Linux, a computer is just a computer. You can either 
ignore those messages or you can do as you suggest, give each computer a 
uidNumber attribute.

> What about the problem?.

No idea, not enough info provided.

> Could it be related to the message?.

I doubt it.


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