[cifs-protocol] CAR: userParameters attribute

tridge at samba.org tridge at samba.org
Thu Jan 14 13:55:20 MST 2010

Dear Dochelp,

The userParameters attribute on a user in AD seems to be a bit of a
puzzle. Could you add some docs on it at some stage? Not a really high
priority, but we would eventually like to be able to offer admin tools
that manage things like session activity timeouts, and it seems that
we need to know how to parse and create userParameters to do that.

An example userParameters attribute from w2k8r2 (in base64 form) is this:


the above came from using the windows user admin tool to change the
session activity timeout for a test user.

Michael Ströder has also pointed out this page:


which documents a previous effort by the Linux thin client community
to work out the format of userParameters. I'm guessing the strange
encoding is used to try to keep the attribute as valid UTF8. If you
can confirm that the attribute is always valid UTF8 that would be
great (as otherwise we might corrupt it during replication with

As I mentioned, this is not a high priority, but it would be nice to
know the format at some stage.

Cheers, Tridge

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