diff --git a/CCMS/src/Customer/D4PBCCustomer.table.al b/CCMS/src/Customer/D4PBCCustomer.table.al
index 2376357..0314853 100644
--- a/CCMS/src/Customer/D4PBCCustomer.table.al
+++ b/CCMS/src/Customer/D4PBCCustomer.table.al
@@ -5,6 +5,7 @@ using D4P.CCMS.Setup;
 using D4P.CCMS.Tenant;
 using Microsoft.Foundation.Address;
 using Microsoft.Foundation.NoSeries;
+using Microsoft.Sales.Customer;
 using System.EMail;
 
 table 62000 "D4P BC Customer"
@@ -21,6 +22,12 @@ table 62000 "D4P BC Customer"
         {
             Caption = 'No.';
             ToolTip = 'Specifies the customer number.';
+
+            trigger OnLookup()
+            begin
+                LookupSalesCustomer();
+            end;
+
             trigger OnValidate()
             begin
                 TestNoSeries();
@@ -159,7 +166,7 @@ table 62000 "D4P BC Customer"
     trigger OnInsert()
     begin
         if "No." = '' then begin
-            CCMSSetup.Get();
+            GetCCMSSetup();
             CCMSSetup.TestField("Customer Nos.");
             "No. Series" := CCMSSetup."Customer Nos.";
             if NoSeries.AreRelated("No. Series", xRec."No. Series") then
@@ -172,13 +179,14 @@ table 62000 "D4P BC Customer"
         CCMSSetup: Record "D4P BC Setup";
         PostCode: Record "Post Code";
         NoSeries: Codeunit "No. Series";
+        IsCCMSSetupLoaded: Boolean;
 
     procedure AssistEdit(OldCustomer: Record "D4P BC Customer"): Boolean
     var
         D4PBCCustomer: Record "D4P BC Customer";
     begin
         D4PBCCustomer := Rec;
-        CCMSSetup.Get();
+        GetCCMSSetup();
         CCMSSetup.TestField("Customer Nos.");
         if NoSeries.LookupRelatedNoSeries(CCMSSetup."Customer Nos.", OldCustomer."No. Series", D4PBCCustomer."No. Series") then begin
             "No." := NoSeries.GetNextNo(D4PBCCustomer."No. Series");
@@ -187,6 +195,56 @@ table 62000 "D4P BC Customer"
         end;
     end;
 
+    /// <summary>
+    /// Retrieves the CCMS setup record using a lazy-loading pattern.
+    /// Only loads the setup once by checking the IsCCMSSetupLoaded flag.
+    /// Populates the CCMSSetup global variable with the CCMS setup configuration.
+    /// </summary>
+    local procedure GetCCMSSetup()
+    begin
+        if IsCCMSSetupLoaded then
+            exit;
+
+        CCMSSetup := CCMSSetup.GetSetup();
+        IsCCMSSetupLoaded := true;
+    end;
+
+    /// <summary>
+    /// Opens the Microsoft sales customer lookup and populates this record when a customer is selected.
+    /// The lookup is only available when using Microsoft sales customers is enabled in setup.
+    /// </summary>
+    local procedure LookupSalesCustomer()
+    var
+        Customer: Record Customer;
+    begin
+        GetCCMSSetup();
+        if not CCMSSetup."Use Microsoft Sales Customer" then
+            exit;
+
+        if Page.RunModal(Page::"Customer Lookup", Customer) = Action::LookupOK then
+            PopulateFromSalesCustomer(Customer);
+    end;
+
+    /// <summary>
+    /// Populates the current CCMS customer record with data from the selected Microsoft sales customer.
+    /// </summary>
+    /// <param name="Customer">The Microsoft sales customer record to copy data from.</param>
+    local procedure PopulateFromSalesCustomer(var Customer: Record Customer)
+    begin
+        Rec.Validate("No.", Customer."No.");
+        Rec.Validate(Name, Customer.Name);
+        Rec.Validate("Address", Customer."Address");
+        Rec.Validate("Address 2", Customer."Address 2");
+        Rec.Validate("City", Customer."City");
+        Rec.Validate("Post Code", Customer."Post Code");
+        Rec.Validate(County, Customer.County);
+        Rec.Validate("Country/Region Code", Customer."Country/Region Code");
+        Rec.Validate("Contact Person Name", Customer.Contact);
+        Rec.Validate("Contact Person Email", Customer."E-Mail");
+
+        OnAfterPopulateFromSalesCustomer(Rec, xRec, Customer);
+    end;
+
     local procedure TestNoSeries()
     var
         D4PBCCustomer: Record "D4P BC Customer";
@@ -199,7 +257,7 @@ table 62000 "D4P BC Customer"
 
         if "No." <> xRec."No." then
             if not D4PBCCustomer.Get(Rec."No.") then begin
-                CCMSSetup.Get();
+                GetCCMSSetup();
                 NoSeries.TestManual(CCMSSetup."Customer Nos.");
                 "No. Series" := '';
             end;
@@ -214,6 +272,11 @@ table 62000 "D4P BC Customer"
         MailManagement.CheckValidEmailAddresses("Contact Person Email");
     end;
 
+    [IntegrationEvent(false, false)]
+    local procedure OnAfterPopulateFromSalesCustomer(var D4PBCCustomer: Record "D4P BC Customer"; xD4PBCCustomer: Record "D4P BC Customer"; MicrosoftSalesCustomer: Record Customer)
+    begin
+    end;
+
     [IntegrationEvent(false, false)]
     local procedure OnBeforeTestNoSeries(var D4PBCCustomer: Record "D4P BC Customer"; xD4PBCCustomer: Record "D4P BC Customer"; var IsHandled: Boolean)
     begin
diff --git a/CCMS/src/Setup/D4PBCSetup.page.al b/CCMS/src/Setup/D4PBCSetup.page.al
index c485a7e..4a79e55 100644
--- a/CCMS/src/Setup/D4PBCSetup.page.al
+++ b/CCMS/src/Setup/D4PBCSetup.page.al
@@ -20,6 +20,9 @@ page 62010 "D4P BC Setup"
                 field("Debug Mode"; Rec."Debug Mode")
                 {
                 }
+                field("Use Microsoft Sales Customer"; Rec."Use Microsoft Sales Customer")
+                {
+                }
             }
             group(Numbering)
             {
diff --git a/CCMS/src/Setup/D4PBCSetup.table.al b/CCMS/src/Setup/D4PBCSetup.table.al
index d546daa..5c6e2e1 100644
--- a/CCMS/src/Setup/D4PBCSetup.table.al
+++ b/CCMS/src/Setup/D4PBCSetup.table.al
@@ -35,6 +35,11 @@ table 62009 "D4P BC Setup"
             TableRelation = "No. Series";
             ToolTip = 'Specifies the number series used to assign customer numbers automatically.';
         }
+        field(6; "Use Microsoft Sales Customer"; Boolean)
+        {
+            Caption = 'Use Microsoft Sales Customer';
+            ToolTip = 'Specifies whether to use Microsoft Sales Customer table relation.';
+        }
     }
 
     keys