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I want to use ActiveSync inside a firewall from iPad. What port does ActiveSync communicate on? Which ports do I have to keep open?

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2 Answers 2

up vote 2 down vote accepted

You’ll need HTTPS (443). No other ports are needed.

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Does even the mail transfer happen over 443? –  Sabya Apr 22 '10 at 12:16
    
it may well just need 443 — I’m not 100% sure, though, sorry. –  Mo. Apr 22 '10 at 15:25
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Yes, everything ocurrs over port 443. No other ports are required. –  joeqwerty Apr 22 '10 at 21:56

If Exchange is configured correctly, you should only need port 443 open on your firewall.

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