The Mac RDP client does not forward the client time zone correctly. When Mac RDP clients connect to Windows 2008 or Windows 7 computers remotely, the system time appears to be correct, but it's really set to "(GMT -07:00) Unknown time zone" [May be different for those outside of PST]. This issue is most apparent when launching Outlook and looking at calendar appointment times.
Server 2008 and Windows 7 include a utility called tzutil that you can use to update the time zone. Example: TZUTIL /s "Pacific Standard Time"
Or this can be resolved by turning off the TS Time Zone Redirection GPO, but then all users get same time zone:
GPO for it:
Computer Configuration\Policies\Administrative Templates\Windows Components\Terminal Services\Terminal Server\Device and Resource Redirection\Allow time zone redirection
(Source: http://technet.microsoft.com/en-us/library/cc725887(WS.10).aspx)
GPO for it:
Computer Configuration\Policies\Administrative Templates\Windows Components\Terminal Services\Terminal Server\Device and Resource Redirection\Allow time zone redirection
(Source: http://technet.microsoft.com/en-us/library/cc725887(WS.10).aspx)
Edit: Aforementioned GPO is location on a Server 2003 DC, for Server 2008 DC look in: Computer Configuration\Policies\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Device and Resource Redirection\Allow time zone redirection
