One-Click Entry – Automating Your SAP Logon with Excel VBA

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If you are an SCM professional, you probably start your day with a routine: Open SAP Logon, find the server, type your ID, and then your password. It’s a repetitive “digital chore” that drains your focus before the real work even begins.

In the SCM Automation Lab, we believe in working smarter. Today, we will build a simple yet powerful Excel tool that handles the entire logon process with a single click.

Step 1: Prepare the VBA Module

First, we need a dedicated space for our automation script within Excel.

  1. Open your Excel file and press Alt + F11 to enter the VBA Editor.
  2. In the top menu, navigate to Insert > Module.
  3. A new white window will appear. This is where we will paste our “Magic Code.”

Caption: Setting up a new module in the VBA Editor to house our automation script.

Step 2: Identify Your SAP Connection Name

To tell Excel which “door” to open, you need the exact name of your server from the SAP Logon Pad.

  1. Open your SAP Logon Pad.
  2. Locate the Description column (e.g., PRD [Production] or ECC_Global).
  3. Note: You must copy this name exactly—including spaces and case sensitivity. A single typo will prevent the connection.

Step 3: The Optimized Automation Code

Instead of “hard-coding” your sensitive password directly into the script, we will design this macro to pull credentials from specific cells: A1 (Connection Name), A2 (ID), and A3 (Password).

Copy and paste the following code into your module:

VBA

' --- SCM Automation Lab: SAP Logon Macro ---
Sub SAP_Logon_Automation()
    Dim SapGuiAuto As Object, SAPApp As Object, SAPCon As Object, session As Object
    Dim ConnName As String, UserID As String, UserPW As String

    ' 1. Pull credentials from Sheet1
    With ThisWorkbook.Sheets(1)
        ConnName = .Range("A1").Value ' Exact Server Description
        UserID = .Range("A2").Value   ' Your SAP User ID
        UserPW = .Range("A3").Value   ' Your SAP Password
    End With

    ' 2. Initialize the SAP GUI Engine
    On Error Resume Next
    Set SapGuiAuto = GetObject("SAPGUI")
    If SapGuiAuto Is Nothing Then
        MsgBox "Please open SAP Logon Pad first!", vbCritical
        Exit Sub
    End If
    Set SAPApp = SapGuiAuto.GetScriptingEngine
    On Error GoTo 0
    
    ' 3. Open Connection & Start Session
    Set SAPCon = SAPApp.OpenConnection(ConnName, True)
    Set session = SAPCon.Children(0)

    ' 4. Automatic Login Sequence
    session.findById("wnd[0]/usr/txtRSYST-BNAME").Text = UserID
    session.findById("wnd[0]/usr/pwdRSYST-BCODE").Text = UserPW
    session.findById("wnd[0]").sendVKey 0 ' Simulate 'Enter' key
    
    MsgBox "SAP Logon Successful!", vbInformation
End Sub

Troubleshooting: Testing Your Code Line-by-Line (F8 Key)

Before finalizing your tool, it is a “Lab Best Practice” to test if the code works exactly as intended. In coding, this is called Debugging.

  1. Arrange your windows so you can see both the VBA Editor and the SAP screen at the same time.
  2. Click anywhere inside your SAP_Logon_Automation code.
  3. Press the F8 key on your keyboard.
    • The first line of the code will be highlighted in yellow.
  4. Keep pressing F8 one step at a time.
    • Watch how the yellow highlight moves and observe your SAP screen simultaneously.
    • You will see the ID/Password being typed and the login proceeding in slow motion!

Caption: Using the F8 key to monitor the automation process step-by-step.

Step 4: Creating the “Logon” Button

Let’s make this tool user-friendly by adding a physical button to your worksheet.

  1. Go to the Developer tab.
  2. Click Insert > Button (Form Control).
  3. Draw the button on your sheet.
  4. When the ‘Assign Macro’ window pops up, select SAP_Logon_Automation and click OK.

Caption: Assigning the logon script to a button for one-click access.

Lab Lead’s Pro-Tip: The “Stealth” Security Method

“Hide your credentials in plain sight.” To keep your password safe from prying eyes, change the font color of cells A1:A3 to white. The cells will appear empty to anyone glancing at your screen, but the VBA script will still read the data perfectly. It’s a simple, low-tech way to add a layer of privacy to your workstation.

📥 Download the Practice File

To help you follow along, I have prepared a template file. It includes the VBA module and the pre-configured automation button.

  • File Name: SCM_Automation_Lab_Post2.xlsm
  • Note: Please remember to enter your own SAP credentials in cells A1:A3 after downloading.

[Download Button: Click Here to Download]

Wrapping Up

Congratulations! You have just reclaimed several minutes of your week. You are now officially transitioning from a standard user to an SCM Automation Specialist.

What’s next? Logging in is just the beginning. In the next post, we will go deeper: How to automatically run T-Codes (like MB52 or MD04) and export live data directly into Excel. Stay tuned to the SCM Automation Lab! If you have any questions, drop them in the comments below.

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