Active directory permissions problem - "insufficient access"

I've written a PHP app to update users in Active Directory using the LDAP protocol. The updates are then visible in the Outlook Address Book.

An addressbookadmin group has been set up in AD with permissions to edit various fields. Users in this group authenticate against AD using the PHP app and thereafter can make changes to the fields they have permissions for.  

I'm stuck trying to get write permissions for a particular field......
In Outlook Address Book there is a Phone/Notes tab. In that tab there is a Notes field. This corresponds to the Notes property in ADUC and to the info attribute in LDAP. I've assigned the addressbookadmin group Read/Write permissions for that field using ADUC.

I've followed the instructions in this article:
to set the permissions.

Every attempt to write to the field via the php app (authenticated as member of addressbookadmin group) results in an "insufficient access" error. I enabled write permissions on the photo and physicaldeliveryofficelocation properties in the same manner and the php app updates these ok.

Any ideas?

Any way to check the AD logs to see if these can shed some light on the problem?

Who is Participating?
Computer101Connect With a Mentor Commented:
PAQed with points refunded (125)

EE Admin
Off the top of my head, have you tried allowing universal priveleges (Everyone, Full Control) temporarily?  I have found "insufficient access" frequently means, "I can't find that thing, so you must not have access."

AD doesn't always play by the expected LDAP rules, and I find I frequently have to tweak my strings differently than I would have expected.
eoinmccarthyAuthor Commented:
Got it working. The ldap-ADUC-OAB mappings are correct. However, the way we set the permissions was causing the problem. Originally they were set using the Advanced security settings tabs. Used the "Delegate Control" wizard and it worked just fine. Don't ask me why - AD access control is definitely not my area.
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