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In classic Outlook, select the
 Calendar, then select New Meeting. -
Next to Optional, enter the names or email addresses of the people you want to invite.
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Enter a meeting subject, start time, end time, and location.
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Add the remaining details and select
 Send.
Note: There's no cc (copy) option for meetings. Adding people as optional can inform them about the meeting but let them know their attendance isn't mandatory. For a workaround on Cc and Bcc, see Add Bcc to meeting.
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In the new Outlook​​​​​​​ for Windows, select theÂ
 Calendar, select New Event. -
In the  Invite attendees field, enter the name or email of individuals you want to invite.Â
At the right end of the field, select Optional to add a line for optional invitees.
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Enter a meeting subject, start time, end time, and location.
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Add the remaining details and select  Send.