Exchange IIS Logs data collection is failing with Unable to write to the data storage engine service.
The following errors are listed in the "Dell.UC.Insights.DataEngine.Service.log"
10-Apr-17 11:05:54 AM: Thread ID 29: Dell.UC.Insights.DataEngine.DataCollector.DataCollectionJob (IL Offset 0x64): Caught exception: Unable to write to the data storage engine service.
NullReferenceException: Object reference not set to an instance of an object. ....
10-Apr-17 11:05:54 AM: Thread ID 29: Dell.UC.Insights.DataEngine.DataCollector.DataCollectionJob (IL Offset 0x64): Caught exception: Unable to process the IIS log file.
AggregateException: One or more errors occurred....
Inner Exception:
TooManyMatchingUsersProblem: Too many Active Directory users match user@domain.com
...