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Ports Used in Exchange Server 2003

 

Topic Last Modified: 2006-04-14

The following table lists Exchange Server 2003 services and their corresponding ports. For more information about how to configure Exchange front-end servers, including the ports that are associated with various scenarios, see the technical article, Using Microsoft Exchange 2000 Front-End Servers. Although that article relates to Exchange 2000 Server, the information applies to Exchange Server 2003 as well.

Ports used in Exchange 2003

Services (dependencies) Ports inbound Ports outbound (initiate connections to) Notes

Microsoft Exchange System Attendant

135 & other RPC

Other ports required for RPC over HTTP

All core Exchange services require the Microsoft Exchange System Attendant.

For more information about RPC over HTTP port configuration, see the guide Exchange Server 2003 RPC over HTTP Deployment Scenarios.

Microsoft Exchange Information Store

(Microsoft Exchange System Attendant)

135 & other RPC

Other ports required for RPC over HTTP

User Datagram Protocol (UDP) packets to random ports for new mail notification

Runs the Exchange databases.

For more information about RPC over HTTP port configuration, see the guide Exchange Server 2003 RPC over HTTP Deployment Scenarios.

Microsoft Exchange MTA Stacks

(Microsoft Exchange System Attendant)

135 & other RPC

102 for X.400 over TCP

135 & other RPC

102 for X.400 over TCP

Microsoft Exchange MTA Stacks are required for legacy connections to Exchange Server 5.5 servers. Port 102 opened only for active X.400 connections.

Simple Mail Transfer Protocol (SMTP)

(IIS Admin Service)

25

25

Exchange store requires SMTP

Microsoft Exchange Routing Engine

(IIS Admin Service)

691

691

Routing Engine service

World Wide Web Publishing Service

(IIS Admin Service)

80 & 443

80 on the front-end server

Required for Outlook Web Access and public folder administration

Exchange ActiveSync

(IIS Admin Service)

 

UDP 2883 on the front-end server

Required for SP2 Exchange ActiveSync Direct Push

Microsoft Exchange POP3

(IIS Admin Service)

110 & 995 (SSL)

110 on the front-end server

Required for POP3 access

Microsoft Exchange IMAP4

(IIS Admin Service)

143 & 993 (SSL)

143 on the front-end server

Required for IMAP4 access

Network News Transfer Protocol (NNTP)

(IIS Admin Service)

119 & (563 SSL)

N/A

Microsoft Exchange Site Replication Service

379, 135 & other RPC

135 & other RPC

Depends whether Exchange Server 5.5 servers are in the organization.

Active Directory Connector

NA

379, 389, can be configured

Depends whether Exchange Server 5.5 servers are in the organization

Microsoft Exchange Event

(Microsoft Exchange Information Store)

Not automatic by default

Exchange Management

(Windows Management Instrumentation)

This is not a required service; however, Microsoft Operations Manager and other programs do not function without this service.

noteNote:
Port 445 is required for Message Tracking
 
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