If on BES and have proper patch or software:
The root cause for this issue is the DST table on those devices are been overwritten by BES with old DST table (see kb-12580
BlackBerry Search Results for more details).
Solution:
1. Run DST Repair Tool in preview mode to find out how many users affected by this issue on the BES
a - Download the DST Repair Tool
http://www.blackberry.com/dst2007/pa...rTimeZones.exe
b- run from BES the command repairtimezones -b ServiceName -db besmgmt -dbauth -dbuser sa -dbpass password -dbms SQL -ol c:\temp -n SQLSERVER
You should get a csv file on c:\temp with status Repair required set to Yes or Not
2 . In case the Repair field is set to yes you can run the DST Repair Tool with -repair:
repairtimezones -b ServiceName -db besmgmt -dbauth -dbuser sa -dbpass password -dbms SQL -ol c:\temp -repair -n SQLSERVER
For more information see release notes for the the DST Repair Tool
http://www.blackberry.com/select/dst...ease_Notes.pdf