After installing the below Windows Updates, Excel Toolbar (developed with ActiveX) stopped working in Excel 2007/2010.
• Security Update for Microsoft Office Excel 2007 (KB2956103)
• Security Update for Microsoft Excel 2010 (KB2956142) 32-bit Edition
We tried the workaround from this link(http://blogs.technet.com/b/the_microsoft_excel_support_team_blog/archive/2014/12/11/forms-controls-stop-working-after-december-2014-updates-.aspx
), but this didn't helped.
Please let us know the solution for the issue.