| Event Id | 1840 |
| Source | Microsoft-Windows-ActiveDirectory_DomainService |
| Description | Internal event: AD_TERM deleted the following unneeded substring index. Substring index:%1 Additional Data AttributeID:%2 |
| Event Information | According to Microsoft : Cause : This event is logged when AD_TERM deleted the unneeded substring index. Resolution : This is a normal condition. No further action is required. |
| Reference Links | Event ID 1840 from Source Microsoft-Windows-ActiveDirectory_DomainService |
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