Hey man, thank you very much for the post
it actually helped me out and I felt compelled to reply to this post to reflect my gratitude...
hopefully this link comes up in the google search so that others can use it too...


> On Wednesday, March 28, 2007 6:52 PM dnova wrote:

> I am trying to add to a list in Sharepoint via SPS3 Web Services,
> specifically Lists.asmx.  It works fine with everything, text, date,
> choice, boolean, but every time I try to fill in a user field it blows
> up
> 
> The operation failed because an unexpected error occurred. (Result
> Code: 0x80020005).
> 
> I've tried all the permutation one can make from these attributes:
> 
>  UserSelectionMode="PeopleOnly" UserSelectionScope="3">MyDomain\MyUser Field>
> 
> I pulled most of these from the results from the GetList method for
> the list I am trying to add to.
> 
> I've also tried user_at_domain, user, "Lastname, Firstname" and several
> others.  Any help would be a big plus!


>> On Thursday, April 05, 2007 11:40 AM dnova wrote:

>> On Mar 28, 6:52 pm, dno..._at_gmail.com wrote:
>> 
>> 
>> 
>> OK, I got it.  For user / group it wants the ID for the user on that
>> site / site collection.  Use _vti_bin/usergroup.asmx and call the
>> GetUserInfo method passing it domain\user.  The resulting Xml will
>> have an ID attribute which is what updatelistitems wants.  Thanks for
>> the help no one!


>>> On Wednesday, May 23, 2007 3:47 AM Jussi wrote:

>>> If the user does not exist on the site you get a SoapException. Should
>>> I add the new user somehow somewhere before querying for the ID? MOSS
>>> does this somehow when using the People Picker.
>>> 
>>> - Jussi