| Procedure | Screenshot |
|---|---|
| 1. Get or prepare the contact list in Google Sheet |  |
| 2. Copy all the email address from the Google Sheet | 1)Select the second row of Email column, Press "CTRL + SHIFT+ Down arrow key") to expand the selection till the last row of non-blank cell. 2) CTRL + C to copy the values selected |
| 3. At Challenge wizard, select Audience, click on "Add Users by mail" |  |
| 4. Paste (CTRL + V) in text box , click on "Subscribe" |  |
| 5. You can see the people are invited |  |
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