| Attribute | Must | Description |
|---|---|---|
| Admin-Description | Used by Admin to hold a small discription of any object in the directory | |
| Admin-Display-Name | Admin Display Name for the object | |
| Alt-Recipient-BL | Backlink for Alt-Recipient on Mail-Recipient | |
| Ancestor-ID | (on NC prefix) invocation_id of dsa which created master of this NC | |
| Assoc-Remote-DXA | Backlink for Responsible-Local-DXA on Remote-DXA | |
| Auth-Orig-BL | Backlink for Auth-Orig on Mail-Recipient | |
| Can-Create-PF-BL | Backlink for List of Mailboxes that can create Public Folders | |
| Can-Create-PF-DL-BL | Backlink for List of DL membership that can create Public Folders | |
| Can-Not-Create-PF-BL | Backlink for List of Mailboxes that can NOT create Public Folders | |
| Can-Not-Create-PF-DL-BL | Backlink for List of DL membership that can NOT create Public Folders | |
| Description | optional long description allowed on any type of object | |
| DL-Mem-Reject-Perms-BL | Backlink for DL-Mem-Reject-Perms on Mail-Recipient | |
| DL-Mem-Submit-Perms-BL | Backlink for DL-Mem-Submit-Perms on Mail-Recipient | |
| DSA-Signature | For Replication | |
| Extension-Data | Extension-specific Data blobs | |
| Extension-Name | Path & Name of an Extension DLL to add property pages (NOT Inherited). | |
| Extension-Name-Inherited | Path & Name of an Extension DLL to add property pages (Inherited). | |
| Heuristics | ||
| Home-MDB-BL | Backlink: List of users associated with a server | |
| Instance-Type | identifies this as master or replica NC | |
| Is-Deleted | boolean: this object is a tombstone | |
| Is-Member-Of-DL | Backlink for Member on Distribution-List | |
| Master-DSA | points to DSA that holds the master instance of this NC | |
| NNTP-Newsfeeds | List of newsfeeds for this internet news connector | |
| NT-Security-Descriptor | The NT Security descriptor controlling access to this object | |
| Obj-Dist-Name | DN of this object (system-created) | |
| Obj-View-Containers | The views this object is a member of | |
| Object-Class | X | OID of this object's class and (optionally) the OIDs of its superclasses |
| Object-Version | For Replication | |
| Owner-BL | Backlink on owner of a DL | |
| Period-Rep-Sync-Times | for replication | |
| Period-Repl-Stagger | for replication | |
| Public-Delegates-BL | Backlink for Public-Delegates on Mailbox | |
| Replicated-Object-Version | Object verion of this object set by LDAP bidirectional sync agent | |
| Reports | List of direct reports (Backlink to Manager) | |
| Reps-From | DSA Internal use for replication | |
| Reps-To | DSA Internal use for replication | |
| Reps-To-Ext | Contains the Attribute list & Replication-Sensitivity for Messaging Domains | |
| Sub-Refs | list of subordinate references of this NC | |
| Supporting-Stack-BL | Backlink for Supporting-Stack on X.400 Links | |
| Unauth-Orig-BL | Backlink for Unauth-Orig on Mail-Recipient | |
| USN-Changed | for replication | |
| USN-Created | The USN for the object when it was created. | |
| USN-DSA-Last-Obj-Removed | for replication | |
| USN-Intersite | The USN for intersite replication | |
| USN-Last-Obj-Rem | for replication | |
| USN-Source | for replication | |
| When-Changed | system timestamp of last change to this object | |
| When-Created | system timestamp of creation of this object | |
| X500-Access-Control-List | X500 Access Control List |