Hi @jasmeeners, Thank you for your response.
How Event-Based Retention Works in Microsoft Purview. When you set a ComplianceAssetId on a document, it doesn’t start the retention period by itself. It just marks the document as eligible for retention based on an event. The retention period actually begins only after a matching retention event is created and applied to the documents with that ComplianceAssetId.
- How Event-Based Retention Works in Microsoft Purview. When you set a ComplianceAssetId on a document, it doesn’t start the retention period by itself. It just marks the document as eligible for retention based on an event. The retention period actually begins only after a matching retention event is created and applied to the documents with that ComplianceAssetId.
- What You Can See in SharePoint for documents with event-based retention labels, SharePoint’s Compliance Details panel does not show the expiration or disposition date. This information only appears for documents with time-based retention labels.
- What You Can See in Metadata or APIs. Using PowerShell or Microsoft Graph API, you can see the label applied (ComplianceTag) and the ComplianceAssetId. However, important details like the retention start date or expiration date are not available through these tools.
- How to Confirm Retention Is Working. The only way to be sure that the retention period has started and the disposition date has been set is to wait until the retention period ends and then check the Dispositions dashboard in Microsoft Purview. If the document appears there, it means the retention event was applied correctly and the document is being tracked for disposition.
You can refer this Documentation