Event ID - 1011

Event Id1011
SourceMSExchangeFDS
DescriptionProcess %1 (PID=%2). Active Directory contains invalid configuration object, validation error is "%3". Will wait for %4 seconds and retry.
Event InformationAccording to Microsoft
Cause :
This Warning event indicates that Microsoft Exchange File Distribution service found an invalid configuration object in the Active Directory directory service. The File Distribution service must read the configuration data from Active Directory to distribute offline address book and custom Unified Messaging prompts.
This event may occur because of Active Directory schema violations.
Resolution :
If this Warning event frequently occurs, follow these steps:
1.Use the following Exchange Management Shell cmdlet to increase the diagnostic logging level on the General counter of the MSExchangeFDS performance object to the High setting:
Set-EventLogLevel MSExchangeFDS\General -Level High
2.Review other related Error and Warning events in the Application log. These related events may help you determine the root cause of this warning.
3.Use the following Exchange Management Shell cmdlet to set the diagnostic logging level on the General counter of the MSExchangeFDS performance object back to the default Lowest setting:
Set-EventLogLevel MSExchangeFDS\General -Level Lowest.
Reference LinksEvent ID 1011 from Source MSExchangeFDS

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