With the Microsoft Office 365 mobile app you can access Office programs such as Word, Excel, and PowerPoint all from one convenient application on your cell phone or other mobile device. When you sign in with your Delhi 'work or school account', you gain the ability to save files to your cloud locations (OneDrive or SharePoint).
For information on using the Microsoft 365 app, check out these Microsoft Support pages:
Submit a ticket using the I Need Help button.