I was testing one scenario, I have created some main account wrongly. So I want to delete them quickly.
Secondly I want to explore the Office integration In D365 for finance and operations.
So I did following steps to delete the required records quickly.
Organization administration > Setup > Office integration > Excel workbook designer

Select entity “MainAccount”

. Create workbook

and download it

Login in Excel

Open excel

Delete selected records
Publish

Confirm.

Records are successfully deleted.