XGEN: When Do Exchange Users Need a Client Access License (CAL)? (168633)


The information in this article applies to:

  • Microsoft Exchange Macintosh client 4.0
  • Microsoft Exchange Macintosh client 5.0
  • Microsoft Exchange Client 4.0
  • Microsoft Exchange Client 5.0
  • Microsoft Exchange Windows NT client 4.0
  • Microsoft Exchange Windows NT client 5.0
  • Microsoft Exchange Server 4.0
  • Microsoft Exchange Server 5.0
  • Microsoft Exchange Server 5.5
This article was previously published under Q168633

SUMMARY

Any user who wants to access information on a computer running Microsoft Exchange Server requires a Client Access License (CAL) for Exchange. However, not all users of Microsoft Exchange clients require a Windows NT Server Client Access License (CAL).

MORE INFORMATION

How to determine if you need a Windows NT Server CAL.

If your client uses Windows NT Server for any of these basic networking features, a Windows NT Server CAL is required: 
   File Sharing
   Printer Sharing
   Remote Access Services
   Mac Services
If your Exchange Client user is not using any of the above networking features of Windows NT Server, a Windows NT Server CAL is not required. If you use Windows NT Server strictly as an application server (that is, just to run Exchange) does not require a Windows NT Server CAL.

For additional information on Windows NT Server Client Access Licenses, please see the following article in the Microsoft Knowledge Base:

151307 Client Access License (CAL)

Modification Type:MinorLast Reviewed:8/16/2005
Keywords:kbinfo kbusage KB168633
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