diff --git a/WebAPI/LearningHub.Nhs.Database/LearningHub.Nhs.Database.sqlproj b/WebAPI/LearningHub.Nhs.Database/LearningHub.Nhs.Database.sqlproj
index e3ceaba79..054baf7a8 100644
--- a/WebAPI/LearningHub.Nhs.Database/LearningHub.Nhs.Database.sqlproj
+++ b/WebAPI/LearningHub.Nhs.Database/LearningHub.Nhs.Database.sqlproj
@@ -534,7 +534,7 @@
     <Build Include="Tables\Resource\ScormResourceReferenceEvent.sql" />
     <Build Include="Tables\Resource\ScormResourceReferenceEventType.sql" />
     <None Include="Scripts\Post-Deploy\Scripts\UpdateFileTypes.sql" />
-    <Build Include="Triggers\external\AddDigitalLearningSolutionsExternalSystem.sql" />
+    <None Include="Scripts\Post-Deploy\Scripts\AddDigitalLearningSolutionsExternalSystem.sql" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Scripts\Pre-Deploy\Scripts\Card5766_AuthorTableChanges.PreDeployment.sql" />
diff --git a/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Script.PostDeployment.sql b/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Script.PostDeployment.sql
index 2d0cae38b..34ba8ad39 100644
--- a/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Script.PostDeployment.sql
+++ b/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Script.PostDeployment.sql
@@ -69,6 +69,8 @@ END
 
 UPDATE [resources].[ResourceVersion] SET CertificateEnabled = 0 WHERE VersionStatusId <> 1 AND CertificateEnabled IS NULL
 
+-- do not delete the script AddDigitalLearningSolutionsExternalSystem
+:r .\Scripts\AddDigitalLearningSolutionsExternalSystem.sql
 :r .\Scripts\Bookmark.sql
 :r .\Scripts\PopulateEventTypes.sql
 :r .\Scripts\InternalSystem.sql
diff --git a/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Scripts/AddDigitalLearningSolutionsExternalSystem.sql b/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Scripts/AddDigitalLearningSolutionsExternalSystem.sql
new file mode 100644
index 000000000..4ca9670d4
--- /dev/null
+++ b/WebAPI/LearningHub.Nhs.Database/Scripts/Post-Deploy/Scripts/AddDigitalLearningSolutionsExternalSystem.sql
@@ -0,0 +1,47 @@
+
+-------------------------------------------------------------------------------
+-- Author       Colin Beeby
+-- Created      21-03-2024
+-- Purpose      Ensure that when a user is associated with external system DigitalLearningSolutionsSso, they are also associated with DigitalLearningSolutions
+--
+-- Modification History
+--
+-- 21-03-2024  ColB Initial Version
+-- 15-11-2024  SA   Modified the script to execute check if the trigger exists in the table schema
+-------------------------------------------------------------------------------
+
+-- Check if the trigger exists in the [external] schema and the [ExternalSystemUser] table
+IF NOT EXISTS (SELECT * FROM sys.triggers WHERE name = 'InsertTrigger_AddDigitalLearningSolutionsExternalSystem' AND parent_id = OBJECT_ID('[external].[ExternalSystemUser]'))
+BEGIN
+    -- Create the trigger if it doesn't exist
+    EXEC('
+        CREATE TRIGGER [external].InsertTrigger_AddDigitalLearningSolutionsExternalSystem
+        ON [external].[ExternalSystemUser]
+        FOR INSERT
+        AS
+        BEGIN
+            DECLARE @DigitalLearningSolutionsId INT;
+            DECLARE @DigitalLearningSolutionsSsoId INT;
+
+            -- Get the DigitalLearningSolutions ExternalSystemId
+            SELECT @DigitalLearningSolutionsId = id
+            FROM [external].[ExternalSystem]
+            WHERE code = ''DigitalLearningSolutions'';
+
+            -- Get the DigitalLearningSolutionsSso ExternalSystemId
+            SELECT @DigitalLearningSolutionsSsoId = id
+            FROM [external].[ExternalSystem]
+            WHERE code = ''DigitalLearningSolutionsSso'';
+
+            -- Check if the inserted row has ExternalSystemId matching DigitalLearningSolutionsSsoId
+            IF EXISTS (SELECT 1 FROM inserted WHERE ExternalSystemId = @DigitalLearningSolutionsSsoId)
+            BEGIN
+                -- Insert into ExternalSystemUser table
+                INSERT INTO [external].[ExternalSystemUser] 
+                    (UserId, ExternalSystemId, Deleted, CreateUserId, CreateDate, AmendUserId, AmendDate)
+                SELECT UserId, @DigitalLearningSolutionsId, Deleted, CreateUserId, CreateDate, AmendUserId, AmendDate
+                FROM inserted;
+            END
+        END;
+    ');
+END;