Client Access License (CAL)

 Last reviewed: November 13, 1997
Article ID: Q151307
3.10 3.50 3.51 WINDOWS kbother

The information in this article applies to: 

  - Microsoft Windows NT Advanced Server version 3.1
  - Microsoft Windows NT Server versions 3.5 and 3.51
  - Microsoft File and Print Services for NetWare version 3.51
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SUMMARY

This article describes issues related to client access license.

MORE INFORMATION

There are two different licensing models that customers can choose, either a per server or per seat. The per server licensing (concurrent licensing) will cause Windows NT to implement a concurrency check to only allow the number of concurrent file/print users as configured in license manager. Per seat licensing does not implement the license manager check, though the customer must still purchase a client access license (CAL) for such clients.

The following uses require a CAL:

  • Server Message Block (SMB) file & print (Windows NT Server)
  • NCP file & print (FPNW)
  • Remote Access Service (RAS)
  • Services for Macintosh (SFM)

Examples of SMB connections are: connecting to a Windows NT server file share or printer share through Windows for Workgroups 3.11, a Microsoft Network client, a LAN manager client, or a Windows 95 client. A NetWare client access FPNW requires a separate CAL.

The following applications *do not* require a CAL:

  • http
  • gopher
  • ftp

KBCategory: kbother
KBSubcategory: ntlicense ntsrvwkst
Additional reference words: CAL
Keywords : ntlicense NTSrvWkst kbother
Version : 3.10 3.50 3.51
Platform : WINDOWS

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Last reviewed: November 13, 1997
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