You can invite external contacts to a calendar meeting:

  1. Create a new meeting and click Invite Attendees:

  2. In the To field type in the email addresses of the attendees:

  3. Send the invite.

You can also send invite external contacts by sending them an email after the meeting is already created:

  1. Open Calendar and find this meeting.
  2. Right-click the meeting and select New Email to Attendees:

  3. Enter their email addresses and send the email.

You can also send an email to attendees on behalf of other user:

  1. Make sure you have the necessary permissions. Read the Knowledge Base article on How do I enable Send As or Full Access permissions on Exchange 2007/2010 account? for more information.
  2. Open Calendar and find this meeting.
  3. Right-click the meeting and select New Email to Attendees.
  4. Click From field and select another user's email address:



    Note: If you do not see the From field, navigate to Options and select From in the section Show fields.
  5. Enter attendees's email addresses and send the email.

Important note: If you send on somebody's behalf and receive a NDR which states that you do not have enough permissions to send on behalf of this person, do the following when sending invites:

  1. Open Calendar and find this meeting.
  2. Right-click the meeting and select New Email to Attendees:
  3. Click From field and select Other email addresses:

  4. Click From and select this person from the Global Address List:




  5. Send the email.