Microsoft KB Archive/328760

= XCCC: Assigning Port Values for Instant Message Fixed Port Callback Delivery =

PSS ID Number: 328760

Article Last Modified on 6/17/2003

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The information in this article applies to:


 * Microsoft Exchange 2000 Server

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This article was previously published under Q328760



SUMMARY
Instant Message Polling and Fixed Port callback delivery are new connection features that are available in Exchange 2000 Service Pack 1 (SP1). You can use these features to configure connections between a server that is running Exchange 2000 Instant Messaging Service and an Instant Messenger client computer, even if the server or the client is protected by a firewall.



MORE INFORMATION
The Instant Messenger client polls the server that is running Instant Messaging Service at regular intervals during Instant Message Polling to look for pending notifications. When a connection is established with the server that is running Instant Messaging Service, the notifications are delivered.

Either a single port or a range of ports is designated for outbound connections from the server that is running Instant Messaging Service to the Instant Messenger client during Fixed Port callback delivery. The Instant Messenger client callback port is limited to a single port that is specified by a limited range. Fixed Port callback delivery is a restrictive delivery mechanism, in which the port values can range from 1025 to 65535.

Although you can enter value ranges from 1 to 65535 in the Fixed Port(s) setting in the user interface (UI), the permissible range is 1025 to 65535. If you select port ranges that start at a value that is less than 1025, the Instant Messenger client uses random port selection.

For additional information about configuring Instant Message Polling on the Instant Messenger client, click the article number below to view the article in the Microsoft Knowledge Base:

326013 XCCC: White Paper - Instant Message Polling and Fixed Port Callback Delivery

Keywords: kbinfo KB328760

Technology: kbExchange2000Search kbExchange2000Serv kbExchange2000ServSearch kbExchangeSearch

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