Share Outlook calendar with external party

I got a request from a user to share his calendar with an external party. First of all I'm not really sure I know how to do it but even if I figure it out, is it secure enough to go forward with it? I know they can email the calendar but also would like direct access.
I'm running an on-premise Exchange 2013 server with Outlook 2013 clients.

Alan DalaITAsked:
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JonathanSpitfireSenior Solutions EngineerCommented:
This might be what you are looking for.

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Hope this helps,


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