1. Go to Settings from the main menu

2. Click the Upload customer data from the Data&Migration settings 

3. Download the customer data Template

4. Enter the necessary details

5. Upload the file and map the label with the relevant excel sheet data-filled label.

6. And click Proceed.

Note: In a single excel sheet 1000 customer numbers only allowed.If you have more customers split it into multiple1000's excel sheets and upload it.