Microsoft is limiting the free use of Outlook 2007 to Exchange 2007 users.
Licensing terms for the new Exchange e-mail platform software only give free Outlook e-mail software use to registered Microsoft Software Assurance upgrade subscription users.
As firms normally want to run Outlook with Exchange, the licensing change could prove costly to many firms.
Exchange 2007 was released last month, but it does not include Outlook 2007 in its Client-Access License (CAL).
Previous versions of Exchange saw customers given a free copy of Outlook with each Exchange CAL. For instance, with Exchange 2003, if a firm installed the platform along with 150 CALs, they would also be given 150 copies of Outlook 2003.
But the new licence restricts free Outlook 2007 software to those firms with Software Assurance in place as of 30 November.
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