...
The CDW-ED Realtime Replication Process runs every 5 minutes to retrieve changes occurred in the Campus Data Warehouse (CDW) to the Enterprise Directory. If this attribute does not have a value, the realtime real-time process will continue to updated displayName with the person's cn comonName. If this attribute does contain a value of 'Y', the realtime real-time process will stop updating displayName.
...
The Enterprise Directory managed by Information Management Systems, IT Services.
Access Permission
This is not an a user attribute.