I know I'm just another in a long list of people who have active
directory developers who have problems, but I'm going to post anyway:

I add a user to the container:

"CN=Users,DC=my,DC=domain,DC=com"

I set the following properties:

oDE = GetDirectoryObject(LDAPDomain);
oDEC = oDE.Children.Add("CN=" + user.UserName, "User");

oDEC.Properties["samAccountName"].Add(user.UserName);
oDEC.Properties["userPrincipalName"].Add(user.UserName);
oDEC.Properties["givenName"].Add(user.FirstName);
oDEC.Properties["sn"].Add(user.LastName);
oDEC.Properties["displayName"].Add(user.FirstName + " " +
user.LastName);
oDEC.Properties["accountExpires"].Add(-1)

I then commit the changes and the user saves fine, with the exception
that they are disabled

I then try to modify the user:

oDEC.Properties["userAccountControl"].Value = 512;

when I commit the changes, I get the dreaded error:

The server is unwilling to process the request.

Can somebody tell me what that error means? Any thoughts on how to
debug or toubleshoot this?

Also, I tried to set the accountExpires to various long integers, but
my result never changes. This is supposed to be some goofy number of
100 nanoseconds (who thought this was a good idea?) since 1/1/1600. -1
will make the account never expire, but other values (even thought I
use a 64 bit integer) don't seem to work.

Any help related to any of this is appreciated!

Thanks -

Tim Burda