A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Rajabharathi,
Conflicts with the Excel settings is one of the possible reasons why the create option is remained greyed out. Make sure that you have a historical time-based data so you can create a forecast in Excel. For more information on how to create forecast in Excel, you can follow the steps in this link.
If you are still having issues even if you have a historical time-based data, we suggest that you perform a repair Office from the Control Panel. You can follow the steps in this link.
Should you need further assistance, don't hesitate to get back to us.