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Understanding the Ports That Are Used by Exchange 2007 in a Mixed Environment

 

Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007

Topic Last Modified: 2010-07-20

This topic describes the ports that you must open to enable communication in a mixed environment that contains Microsoft Exchange Server 2003 and Microsoft Exchange Server 2007 computers. The following tables describe the specific ports that must be open between computers that are running different server and client roles.

Ports to Communicate Together With a Hub Transport Server

To communicate from this computer: To an Exchange 2007 Hub Transport server, use these ports:

Exchange 2007 Hub Transport server

SMTP (25/587 TCP) SSL

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

RPC MAPI (135 TCP)

Public Folders (hosted by an Exchange 2007 Mailbox server)

RPC MAPI (135 TCP)

SMTP Relay servers (in a perimeter network)

SMTP (25,995 SMTP TLS)

Exchange 2007 Unified Messaging server

SMTP (25,995 SMTP TLS)

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

SMTP (25,995 SMTP TLS)

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

No direct connection

Exchange 2003 back-end server

No direct connection

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With a Client Access Server

To communicate from this computer: To an Exchange 2007 Client Access server, use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

80/443 TCP SSL

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by an Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

VoIP (TCP 5060,5061 SSL,5065,5066)

Outlook 2003 client

RPC over HTTP (80/443 TCP)

Outlook 2007 client

RPC over HTTP (80/443 TCP)

Other clients (POP3/SMTP/IMAP4)

POP3 (110/995 TCP), IMAP (143/993 TCP)

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

HTTP

Exchange 2003 back-end server

No direct connection

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With a Mailbox Server

To communicate from this computer: To an Exchange 2007 Mailbox server, use these ports:

Exchange 2007 Hub Transport server

RPC MAPI (135 TCP), many dynamic*

Exchange 2007 Client Access server

RPC MAPI (135 TCP), many dynamic*

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by an Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

RPC MAPI (135 TCP), many dynamic*

Outlook 2003 client

RPC MAPI (135 TCP), many dynamic*

Outlook 2007 client

RPC MAPI (135 TCP), many dynamic*

Other clients (POP3/SMTP/IMAP4)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 Bridgehead server

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With Public Folders on a Mailbox Server

To communicate from this computer: To the Public Folders (hosted by an Exchange 2007 Mailbox server), use these ports:

Exchange 2007 Hub Transport server

RPC MAPI (135 TCP), many dynamic*

Exchange 2007 Client Access server

RPC MAPI (135 TCP), many dynamic*

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by an Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

RPC MAPI (135 TCP), many dynamic*

Outlook 2007 client

RPC MAPI (135 TCP), many dynamic*

Other clients (POP3/SMTP/IMAP4)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With SMTP Relay Servers

To communicate from this computer: To the SMTP Relay servers (in a perimeter network), use these ports:

Exchange 2007 Hub Transport server

SMTP (25)

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

No direct connection

Public Folders (hosted by an Exchange 2007 Mailbox server)

No direct connection

SMTP Relay servers (in a perimeter network)

SMTP (25)

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

No direct connection

Exchange 2003 back-end server

No direct connection

Domain controller

No direct connection

 

Ports to Communicate Together With a Unified Messaging Server

To communicate from this computer: To an Exchange 2007 Unified Messaging server, use these ports:

Exchange 2007 Hub Transport server

SMTP (25,995 SMTP TLS)

Exchange 2007 Client Access server

5060/5061/5062 TCP, dynamic

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by Exchange 2003 back-end server)

No direct connection

Exchange 2003 back-end server

No direct connection

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With an Outlook 2003 Client

To communicate from this computer: To an Outlook 2003 client, use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

 

Ports to Communicate Together With an Outlook 2007 Client

To communicate from this computer: To an Outlook 2007 client, use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

No direct connection

Exchange 2003 back-end server

No direct connection

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

 

Ports to Communicate Together With Other Clients

To communicate from this computer: To other clients (POP3/SMTP/IMAP4), use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 Back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With an Exchange 2003 Bridgehead Server

To communicate from this computer: To an Exchange 2003 Bridgehead server, use these ports:

Exchange 2007 Hub Transport server

SMTP (25,995 SMTP TLS)

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

No direct connection

Public Folders (hosted by an Exchange 2007 Mailbox server)

No direct connection

SMTP Relay servers (in a perimeter network)

SMTP (25,995 SMTP TLS)

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

SMTP (25,995 SMTP TLS)

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With an Exchange 2003 Front-End Server

To communicate from this computer: To an Exchange 2003 front-end server, use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

No direct connection

Exchange 2007 Mailbox server

No direct connection

Public Folders (hosted by an Exchange 2007 Mailbox server)

No direct connection

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

No direct connection

Exchange 2003 front-end server

No direct connection

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With Public Folders on an Exchange 2003 Server

To communicate from this computer: To the Public Folders (hosted by Exchange 2003 back-end server), use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

RPC MAPI (135 TCP), many dynamic*

Exchange 2007 Mailbox server

HTTP

Public Folders (hosted by an Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 front-end server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With an Exchange 2003 Back-End Server

To communicate from this computer: To an Exchange 2003 back-end server, use these ports:

Exchange 2007 Hub Transport server

No direct connection

Exchange 2007 Client Access server

80/443 TCP

Exchange 2007 Mailbox server

No direct connection

Public Folders (hosted by Exchange 2007 Mailbox server)

RPC MAPI (135 TCP), many dynamic*

SMTP Relay servers (in perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

No direct connection

Outlook 2003 client

No direct connection

Outlook 2007 client

No direct connection

Other clients (POP3/SMTP/IMAP4)

No direct connection

Exchange 2003 Bridgehead server

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 front-end server

RPC MAPI (135 TCP), many dynamic*

Public Folders (hosted by an Exchange 2003 back-end server)

RPC MAPI (135 TCP), many dynamic*

Exchange 2003 back-end server

RPC MAPI (135 TCP), many dynamic*

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

 

Ports to Communicate Together With a Domain Controller

To communicate from this computer: To a domain controller, use these ports:

Exchange 2007 Hub Transport server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Exchange 2007 Client Access server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Exchange 2007 Mailbox server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Public Folders (hosted by an Exchange 2007 Mailbox server)

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

SMTP Relay servers (in a perimeter network)

No direct connection

Exchange 2007 Unified Messaging server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Outlook 2003 client

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

Outlook 2007 client

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

Other clients (POP3/SMTP/IMAP4)

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Exchange 2003 Bridgehead server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Exchange 2003 front-end server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Public Folders (hosted by an Exchange 2003 back-end server)

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Exchange 2003 back-end server

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Domain controller

LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

* By default, "many dynamic ports" is the port range 1024-65535.

 
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