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Event ID: 20491 Source: LiveCommunicationServer

Level
Description
Server could not retrieve information from Active Directory.

HRESULT: <error code>
Cause: This could happen if the domain controller and /or global catalog are not functional or cannot be contacted or if permissions to the service account are altered.
Resolution: Make sure that connection to Active Directory is functional and the account the service is running under has proper privileges.
Comments
 
Reset the LCService account password and that will solve it.

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