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Home » Knowledge Base » Microsoft Exchange 2003/2007 » Ports for Outlook, Exchange, and VPN

Ports for Outlook, Exchange, and VPN

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Ports for Outlook, Exchange, and VPN


This is technical information for IT Professionals.

Port for VPN connection: 1723

Ports for Outlook / Exchange communication:  135, 1025, 1026, 1225, 1226, 1228

Many ISPs are blocking port 135.  If your ISP is blocking this port, you must establish a VPN connection or set up the connection type as RPC over https before Outlook will connect to the Exchange servers.

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Last Modified:Monday, February 23, 2009
Type: INFO
Rated 2 stars based on 18 votes.
Article has been viewed 9,292 times.
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