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XCLN: Configuring Mac Client for TCP/IP

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Article ID:149596
Last Review:October 28, 2006
Revision:2.3
This article was previously published under Q149596

SYMPTOMS

If MacTCP is not configured correctly, an error is displayed when you try to check a name using a Transmission Control Protocol/Internet Protocol (TCP/IP) connection type.

The following errors may be generated:
The name could not be resolved. Network problems are preventing connection to the Microsoft Exchange Server computer. Contact your system administrator if this condition persists.

The name could not be resolved. The action could not be completed.

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WORKAROUND

1.Verify the account name using the Microsoft Exchange Administrator program.
2.From the Mac workstation, ensure the Microsoft Exchange Server and name are entered correctly. Do not use the Appletalk name if it is different from the Microsoft Exchange Server name.

NOTE: The Appletalk name is setup through MacFile control panel on the Windows NT Server.
3.Ensure MacTCP Ping can successfully ping the Microsoft Exchange server. If not, MacTCP is not correctly set up on the workstation or TCP/IP is not correctly set up on the Microsoft Exchange Server computer.
4.If Appletalk routing is enabled, check the Appletalk Connection option instead of TCP/IP. If the name can be resolved, then the behavior is a MacTCP or DNS (hosts) issue.
5.If MacTCP is using DNS, ensure MacTCP has the correct IP addresses in the DNS configuration. Ensure a default DNS has been selected. Also, verify that the DNS has the correct name resolution entered for the Microsoft Exchange Server (appropriate A and MX records).
6.If a local Mac hosts file is used, a CNAME and A record must be entered. "Hosts" file is located in the "System folder" by default (and should be located in the System sub-directory to use with MacTCP).

Mac hosts file format:
<Exchange server name> CNAME <IP domain name>
<IP domain name> A <corresponding IP address>
For Example:
EXCH1 CNAME exch1.business.com.
exch1.business.com. A 157.54.16.157
NOTE: If the Exchange Server name resolves to a name other than the name in the hosts file, change the Exchange Server name in the hosts file to match the resolved name. If the user is not sure about the Internet Protocol (IP) domain name, they can run IPConfig at a command prompt on the server and find the domain suffix. The IP domain name should consist of the server name with the domain suffix (as in the example above). All domain names should end with a period (or dot).
•Using the earlier example, create hosts files.

•Navigate to Apple (menu), Control Panels, and then TCP/IP

•Navigate to Edit (menu), and then User Mode. Select Advanced, and click OK.

•Click Select Hosts File; highlight the hosts file already created, and then click Open.

•Close the TCP/IP Control Panel, and then click Save when prompted.

•Restart the computer.

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MORE INFORMATION

•Microsoft Exchange uses name resolution to check the name.

•Microsoft recommends you use the DNS setup instead of a local Hosts file for ease of administration, setup, and troubleshooting.
NOTE: Apple File Protocol defaults to port 548.

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APPLIES TO
•Microsoft Exchange Client 4.0 for Macintosh
•Microsoft Exchange Client 5.0 for Macintosh

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Keywords: 
kbusage KB149596

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