The following error appears in the Collaboration Services event log:
"<AD Sender> (30878) Collection <collection>: Failed to collect information from domain dc=domain,dc=com. Code : 0x80049f13,Description : columns CollectionID, ObjectGUID, AttributeName are not unique"
Some AD information may not be synchronizing as a result. What is causing this error?
In some cases, the QCS believes there is duplicate data in it's database when in fact there is not.
Please see the attached script for a resolution. This script adds a new key to the database table in question, resolving the problem.