query about bnc#11097 and Windows Credential error 0x80090345

Andrew Bartlett abartlet at samba.org
Wed Aug 19 21:57:04 UTC 2015

On Wed, 2015-08-19 at 15:18 +0100, Noel Power wrote:
> Hi,
> With samba 4.2 and samba configured as a PDC with a windows 8.1 
> client
> it still errors out with 0x80090345 when raising the credential 
> manager,
> the fix for this https://bugzilla.samba.org/show_bug.cgi?id=11097 twe
> aks
> the BackupKey Remote Protocol (MS-BKRP) but afaics with Samba in PDC
> mode the windows client doesn't even try to use this protocol (which
> MS-BKRP says is for AD anyway)
> I've pored over the associated logs and network traces for this but 
> find
> no errors or details in the conversation with the samba PDC to 
> explain
> why this error is triggered. Additionally it seems that users that
> previously were logged in (prior to install of KB2992611)  to the 
> win8.1
> client don't raise the error, however if a user not previously logged 
> is
> used bingo attempt to raise the Cred Manager and you get  0x80090345.
> Does anyone have any more info on this,  is it really the case that 
> for
> samba in PDC mode that there is nothing more that can be done  :/

Thanks for updating the wiki.  The other alternative is to implement
BackupKey for the NT4 DC.  The code could be put in common, with enough

However, I think it would require multiple engineer-weeks, all up. 

Andrew Bartlett

Andrew Bartlett
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   

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