VBA & Macro Problems

How to Prevent Excel VBA Conflicts with Multiple Users in SharePoint

Huma Ashraf Ch Oct 10, 2026 869 views

Question details

Users need a reliable way to prevent multiple people from running VBA macros simultaneously in a shared SharePoint workbook to avoid synchronization conflicts.

Prevent Excel VBA Conflicts When Multiple Users Work in SharePoint

Product: Microsoft Excel, SharePoint
Device & OS: not provided
Scenario: Multiple users accessing and editing an Excel workbook with VBA macros hosted on a SharePoint Document Library.
Observed behavior: Disabling a VBA user-form button locally only affects the current user's interface. It does not stop other users from running the macro at the same time, leading to simultaneous edits and data synchronization conflicts.

Before you start

Ensure you have Site Owner or Member permissions in the SharePoint Document Library to modify versioning and check-out settings.

Solution 1Recommended

Require SharePoint Check-Out and Check-In

Enforce an exclusive lock on the workbook via SharePoint so only one person can edit the file and run macros at a time.

Because local VBA interface modifications (such as disabling a button) only affect a single user's session, you must use SharePoint's native check-out feature to coordinate multi-user access and completely prevent synchronization conflicts.

Access Library Settings

Navigate to the SharePoint Document Library where your Excel workbook is stored. Click the Settings (gear) icon in the top right corner, then select Library settings.

Enable Check-Out Requirement

Click on 'Versioning settings'. Scroll down to the 'Require Check Out' section at the bottom of the page and select 'Yes' for 'Require documents to be checked out before they can be edited'.

Check Out the File

Before running the macro, users must now right-click the Excel file in the SharePoint library, select 'More', and click 'Check out'. This exclusively locks the file for that user.

Check In the File

After the VBA script finishes running and all changes are saved, right-click the file in SharePoint, select 'More', and click 'Check in' to release the lock for other users.

Require SharePoint Check-Out and Check-In

Locking Guaranteed: Using the check-out requirement ensures that no two users can trigger overlapping macros or create conflicted copies of the workbook.

Solution 2

Hide or Disable the VBA Button During Execution

Improve the local user interface to prevent a single user from double-clicking or re-running a macro while it is currently processing.

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Frequently Asked Questions

Why doesn't disabling the VBA button stop others from running the macro?

Disabling a user-form button via VBA only affects the local interface of the user who clicked it. It does not communicate with SharePoint or other users' instances of the workbook to lock their interfaces.

Can VBA code detect if an Excel file is currently being co-authored?

Yes, you can check properties like ActiveWorkbook.MultiUserEditing in VBA. However, for files hosted in SharePoint, using native check-out/check-in settings is a much more robust and secure way to prevent editing conflicts.

What happens if two users run a macro simultaneously in a shared SharePoint workbook?

It typically results in a synchronization conflict because changes happen simultaneously. SharePoint may fail to merge the overlapping changes and create a separate, conflicted copy of the workbook, requiring you to resolve the data manually.

Excel & Data Problems