A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Shannon,
Based on our test, if you open a macro enabled document in SharePoint library and want to edit the workbook to co-authoring. The workbook will be locked by the user who is editing the workbook. You can only open the workbook in read only mode. If you click the Edit Workbook button, there will be a pop up window to prompt you that the file is in use, you can choose View a read-only copy or Save the edit a copy of the file.
So it is not feasible to co-authoring a macro-enabled file.
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Thanks for your understanding.
Tisky