There are known issues that cause some email clients, especially older clients and those on some mobile devices, to provide inconsistent and unreliable updating of calendar information via Exchange ActiveSync. An exact cause is not always known and can vary from client to client. However, to help work around these issues, the following is suggested:
- Make sure to use the most current version of your desktop client software, especially Office 2010 (Windows) or 2011 (Mac).
- Mobile devices are known to have issues with ActiveSync, especially those running older versions of their system software. For details, see the Microsoft article at http://support.microsoft.com/kb/2563324.
- Update your phone/device software when prompted.
- If you are using an older device, such as a first generation iPhone or iPod Touch, you will not be able to rely on the calendar and should consider an upgrade.
- Other suggestions for mobile device use:
- Beware of dropped signals and poor coverage areas that could have an impact on your use of the calendar.
- Consider managing your appointments only from Outlook or OWA. Assuming reliable coverage, you might, for example, be able to create new appointments on a device, but may not want to invite, accept, or decline meetings, or modify any recurring events, until you are using Outlook or OWA (or have successfully tested these functions on your device).
- Manage recurring meetings carefully and only from OWA or a current version of your desktop client software, especially Office 2010 (Windows) or 2011 (Mac).