if you are running 2.x, you are out of luck.
From the INNUA forums:
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Here is an extract from Nortel DST Bulletin Technical Bulletin 2007007646 rev 1. It states Call Pilot Desktop Messaging (for Call Pilots on Releases 2.5 and earlier), will be off 1 hour than as of the March 11 DST implementation date. What the bulletin didn't say is that Desktop Messaging would be off by 1 hour ahead (a jump of two hours) if the PBX is set at the correct time, whereas everybody expected it to remain 1 hour behind.7007646
"ANALYSIS
CallPilot
CallPilot systems connected to the CS 1000 receive their time from the CS 1000 via the AML link. Consequently, adjustments to their internal clocks is not required for changes to Daylight Savings Time (DST). When Extended DST starts March 11, the message header time stamp for users in the same time zone as the server will be correct via a TUI. However, the time stamp of messages, in systems without the Extended DST patch, will be off by one hour in other contexts. Contexts include:
1. Desktop messaging inbox view
2. the Network Message Service time zones feature
RECOMMENDATIONS
CallPilot
A DST Extension PEP will be available for application to CallPilot 3.0 SU02 and CallPilot 4.0 SU03 servers in February 2007. This PEP will not be available for CallPilot 2.5 and earlier systems. In conjunction with the server PEP, an updated CallPilot Manager will be introduced. CallPilot 2.5 and earlier systems should upgrade to 4.0 and apply the DST extension PEP and the CallPilot Manager update. In addition, to the CallPilot PEP, a Microsoft Windows 2003 hot fix will be required for the CallPilot PEP to function. The hot fix and instructions for its use are available at
http://support.microsoft.com/kb/928388 It is recommended to not install the hot fix until the corresponding CallPilot PEP for DST Extension is available"