Hi,
Thank you for choosing Microsoft Communities.
Follow the steps mention below to resolve the issues with Excel,
- Open Excel click on File
- Click on Options
- In options click on Advanced and in the General section of the dialog, uncheck the box for "Ignore other applications that use Dynamic Data Exchange (DDE)"
I hope this helped you, if not do get back to us with more information so that we may assist you further.
Thank you.