You can access your invitation history from the left-side navigation bar. 

•  Email: the email address of the invited user.

• Company Name: the company you invite to join in. If no company was specified, it will be blank.

• Status: describing whether the user has accepted your invitation or not.
  • Pending: The invitee has not accepted your invitation yet.
  • Successful: The invitee has accepted your invitation.
  • Expired: The invitation has been invalid.

• Invitation Time: the time the invitation was sent.

• Action: 
  • Re-invite: If the invitee hasn't accepted your invitation, you can click Re-invite to resend the invitation email.