Mark EntraId sign-in events tables as preview

Updated titles and schema table references to indicate that EntraIdSignInEvents and EntraIdSpnSignInEvents tables are in preview. This clarifies the current release status for users referencing these advanced hunting tables.

Author: poliveria

defender-xdr/advanced-hunting-entraidsigninevents-table.md

@@ -1,5 +1,5 @@
 ---
-title: EntraIdSignInEvents table in the advanced hunting schema
+title: EntraIdSignInEvents table in the advanced hunting schema (preview)
 description: Learn about the Microsoft Entra sign-in events table of the advanced hunting schema.
 search.appverid: met150
 ms.service: defender-xdr

defender-xdr/advanced-hunting-entraidspnsigninevents-table.md

@@ -1,5 +1,5 @@
 ---
-title: EntraIdSpnSignInEvents table in the advanced hunting schema
+title: EntraIdSpnSignInEvents table in the advanced hunting schema (preview)
 description: Learn about information associated with Microsoft Entra service principal and managed identity sign-in events table.
 search.appverid: met150
 ms.service: defender-xdr

defender-xdr/advanced-hunting-schema-tables.md

@@ -96,8 +96,8 @@ The following reference lists all the tables in the schema. Each table name link
 | **[EmailEvents](advanced-hunting-emailevents-table.md)** | Microsoft 365 email events, including email delivery and blocking events |
 | **[EmailPostDeliveryEvents](advanced-hunting-emailpostdeliveryevents-table.md)** | Security events that occur post-delivery, after Microsoft 365 delivers the emails to the recipient mailbox |
 | **[EmailUrlInfo](advanced-hunting-emailurlinfo-table.md)** | Information about URLs on emails |
-| **[EntraIdSignInEvents](advanced-hunting-entraidsigninevents-table.md)** | Microsoft Entra interactive and non-interactive sign-ins |
-| **[EntraIdSpnSignInEvents](advanced-hunting-entraidspnsigninevents-table.md)** | Microsoft Entra service principal and managed identity sign-ins |
+| **[EntraIdSignInEvents](advanced-hunting-entraidsigninevents-table.md)** (Preview)| Microsoft Entra interactive and non-interactive sign-ins |
+| **[EntraIdSpnSignInEvents](advanced-hunting-entraidspnsigninevents-table.md)** (Preview)| Microsoft Entra service principal and managed identity sign-ins |
 | **[ExposureGraphEdges](advanced-hunting-exposuregraphedges-table.md)** | Microsoft Security Exposure Management exposure graph edge information provides visibility into relationships between entities and assets in the graph |
 | **[ExposureGraphNodes](advanced-hunting-exposuregraphnodes-table.md)** | Microsoft Security Exposure Management exposure graph node information, about organizational entities and their properties |
 | **[GraphApiAuditEvents](advanced-hunting-graphapiauditevents-table.md)**  (Preview) | Microsoft Entra ID API requests made to Microsoft Graph API for resources in the tenant |