Thin client-server software developer Citrix Systems announced that the position on its board of directors held until recently by Greg Maffei of Microsoft will now be held by Mike Brown of Microsoft. This change follows the recent appointment of Maffei to the position of chief financial officer of Microsoft. Brown, formerly chief financial officer and now Microsoft financial ambassador, served on the Citrix board during the company's formative years from December 1991 to February 1994.