| Event Id | 1027 |
| Source | Active Directory |
| Description | Internal error: The Instance Type attribute on object %1 is missing. |
| Event Information | Internal error: Active Directory could not retrieve the Instance Type attribute for the queried object. This event can be logged for multiple reasons. To determine whether there is a problem, open Event Viewer and check for related events. No specific user action is available. |
| Reference Links | Monitoring AD Changes: Article |
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