From 258fb7c867e1258b978da29e71deefe84bf0ef0c Mon Sep 17 00:00:00 2001 From: Dimitri Furman Date: Tue, 20 Jan 2026 10:30:08 -0500 Subject: [PATCH 1/2] Add a Database Mail known issue --- support/sql/releases/sqlserver-2022/cumulativeupdate23.md | 6 +++++- support/sql/releases/sqlserver-2025/cumulativeupdate1.md | 6 +++++- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/support/sql/releases/sqlserver-2022/cumulativeupdate23.md b/support/sql/releases/sqlserver-2022/cumulativeupdate23.md index 8e62c713cdd..7c481af6b4b 100644 --- a/support/sql/releases/sqlserver-2022/cumulativeupdate23.md +++ b/support/sql/releases/sqlserver-2022/cumulativeupdate23.md @@ -1,7 +1,7 @@ --- title: Cumulative Update 23 for SQL Server 2022 (KB5074819) description: This article contains the summary, known issues, improvements, fixes, and other information for SQL Server 2022 Cumulative Update 23 (KB5074819). -ms.date: 01/15/2026 +ms.date: 01/20/2026 ms.update-cycle: 1095-days ms.custom: sap:Installation, Patching, Upgrade, Uninstall, evergreen, KB5074819 ms.reviewer: v-shaywood @@ -24,6 +24,10 @@ This article describes Cumulative Update package 23 (CU23) for Microsoft SQL Ser ## Known issues in this update +### Database Mail stops working after installing this cumulative update + +Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. + ### Incorrect behavior of SESSION_CONTEXT in parallel plans [!INCLUDE [av-session-context](../includes/av-sesssion-context.md)] diff --git a/support/sql/releases/sqlserver-2025/cumulativeupdate1.md b/support/sql/releases/sqlserver-2025/cumulativeupdate1.md index 88873d441a5..db9efa723fc 100644 --- a/support/sql/releases/sqlserver-2025/cumulativeupdate1.md +++ b/support/sql/releases/sqlserver-2025/cumulativeupdate1.md @@ -1,7 +1,7 @@ --- title: Cumulative update 1 for SQL Server 2025 (KB5074901) description: This article contains the summary, known issues, improvements, fixes, and other information for SQL Server 2025 Cumulative Update 1 (KB5074901). -ms.date: 01/15/2026 +ms.date: 01/20/2026 ms.update-cycle: 1095-days ms.custom: sap:Installation, Patching, Upgrade, Uninstall, evergreen, KB5074901 ms.reviewer: v-shaywood @@ -24,6 +24,10 @@ This article describes Cumulative Update package 1 (CU1) for Microsoft SQL Serve ## Known issues in this update +### Database Mail stops working after installing this cumulative update + +Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. + ### Incorrect behavior of SESSION_CONTEXT in parallel plans [!INCLUDE [av-session-context](../includes/av-sesssion-context.md)] From 28dd0d605c46c31c876d1a7d939ec5664164c78d Mon Sep 17 00:00:00 2001 From: Dimitri Furman Date: Tue, 20 Jan 2026 10:45:47 -0500 Subject: [PATCH 2/2] Add details of the problem and mitigation --- .../sql/releases/sqlserver-2022/cumulativeupdate23.md | 10 +++++++++- .../sql/releases/sqlserver-2025/cumulativeupdate1.md | 10 +++++++++- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/support/sql/releases/sqlserver-2022/cumulativeupdate23.md b/support/sql/releases/sqlserver-2022/cumulativeupdate23.md index 7c481af6b4b..ef611c7956a 100644 --- a/support/sql/releases/sqlserver-2022/cumulativeupdate23.md +++ b/support/sql/releases/sqlserver-2022/cumulativeupdate23.md @@ -26,7 +26,15 @@ This article describes Cumulative Update package 23 (CU23) for Microsoft SQL Ser ### Database Mail stops working after installing this cumulative update -Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. +Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. When this occurs, you might see the following message: + +```output +Could not load file or assembly 'Microsoft.SqlServer.DatabaseMail.XEvents, Version=17.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified. +``` + +While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. + +If you already installed this cumulative update, [uninstall](/sql/sql-server/install/uninstall-a-cumulative-update-from-sql-server) it to revert Database Mail to a working state. ### Incorrect behavior of SESSION_CONTEXT in parallel plans diff --git a/support/sql/releases/sqlserver-2025/cumulativeupdate1.md b/support/sql/releases/sqlserver-2025/cumulativeupdate1.md index db9efa723fc..71ff8eeecb3 100644 --- a/support/sql/releases/sqlserver-2025/cumulativeupdate1.md +++ b/support/sql/releases/sqlserver-2025/cumulativeupdate1.md @@ -26,7 +26,15 @@ This article describes Cumulative Update package 1 (CU1) for Microsoft SQL Serve ### Database Mail stops working after installing this cumulative update -Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. +Microsoft is aware of an issue where Database Mail stops working after this cumulative update is installed. When this occurs, you might see the following message: + +```output +Could not load file or assembly 'Microsoft.SqlServer.DatabaseMail.XEvents, Version=17.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified. +``` + +While we are working on a fix, we ask that customers who use Database Mail avoid installing this update. + +If you already installed this cumulative update, [uninstall](/sql/sql-server/install/uninstall-a-cumulative-update-from-sql-server) it to revert Database Mail to a working state. ### Incorrect behavior of SESSION_CONTEXT in parallel plans