Microsoft has released a patch for a feature that was introduced in Windows Mobile 6.1.  From the download page:

This behavior is associated with a feature that is introduced in Windows Mobile 6.1. The feature allows for mobile operators to specify an alternate SMTP server name that is used if e-mail messages cannot be sent by using the user-specified SMTP server name. If the mobile operator does not specify an alternate SMTP server name and if the Windows Mobile 6.1-based device does not connect, the e-mail account is corrupted and cannot send e-mail messages.

http://www.microsoft.com/downloads/details.aspx?familyid=d9d71b2e-d2dd-44f2-86e5-1e53aad7fb7a&displaylang=en&tm

Update: Thanks to TravisP for the correction. I incorrectly had ‘savings’ instead of ‘saving’.

Only five days to go, folks!  Not yet patched your Windows CE / Windows Mobile devices?

Get the information and downloads you need here: http://www.microsoft.com/windowsmobile/daylightsaving/default.mspx

For additional detail, check out these knowledge base articles:
Windows CE: http://support.microsoft.com/kb/923027
Windows Mobile: http://support.microsoft.com/kb/923953/

Why should you update your devices (in addition to your desktops and servers)?  Not only will meetings be shown for the incorrect time, but any alarms you set will be off by an hour as well (how many of you use your WM device as your alarm in the morning? Do *you* want to be late for work?).  Additionally, there can be discrepancies with meetings created on the device when they get to Exchange.

Still need to update your workstations and servers as well?  http://support.microsoft.com/default.aspx/gp/cp_dst