GUI 7.40 different font size Excel (Office365 ProPlus and Office 2010)

Hello,

we're going to roll out SAPGui 7.40 Patchlevel 11 and Office365 proPlus on Win10. Some of our test user have a problem with using Excel out of SAPGUI. Using Office365 ProPlus we got an Excel Sheet with a bigger font size and we have to scroll in the Excel window. After deinstall of Office365 and reinstall Office 2010 the font size is normal and we don't have to scroll. What can we do to use Office365?

Someone an idea?

Best Regards Burkhard