When creating a calendar event, external email addresses in the recipient list are highlighted in red with a red dot.

You can view the recipient availability without editing the event.


  1. Tap on the invitees to enter the Free/Busy lookup menu.
  2. If enabled by your administrator, Workspace ONE Boxer displays the notification Send Invite to External Addresses when sending invite to recipients with external addresses.
  3. Confirm the notification to send invite to attendees with external email addresses. The Mark External Addresses feature is also available when you are creating or editing Calendar events.