Recipient: {0} If you used the correct recipient address, they're not receiving email because the recipient address doesn ...

Recipient: {0}
If you used the correct recipient address, they're not receiving email because the recipient address doesn�t exist in your email system. To fix this, you need to add them to Office 365 using the following steps.
  1. In the Office 365 Admin center, go to Active users.
  2. Choose Add a user (Add icon).
  3. Provide the requested information, and a mailbox is created automatically for the new user.