Outlook 2010 Calendar

[matthewR]

I accept meetings but they are not showing in my calendar. Is there something missing or some setting that I am not using.

[Rudi]

I was not able to find straightforward solutions for this through my browsing, but many pages suggested to use two switches to try resolve it:
Outlook.exe /Cleanreminders
Outlook.exe /Cleanfreebusy

Please note that these switches may reset any customization on your part...

Here is also a MS Support page with some advice. See if you can grab anything useful from it: http://support.microsoft.com/kb/890436

BTW: The following might be irrelevant info, but I'd do it anyhow: Clean out your Windows Temp folder and see if that makes a different. It tends to resolve an array of different Outlook issues:
In the text box in the Run window, type %Temp% and click OK.
A folder full of files and other folders will appear.
All of the folders and files you see in this Temp folder are no longer being used by Windows and can safely be deleted.
Select any one file, press CTRL+A to select them all
Press delete and confirm
Close Outlook and restart.