I have Exchange 2003 with SP2. I have one user where certian calendar appointments (outlook 2007) that will not show up in their OWA. I can not seem to find a reason for this...It appears to only be happening to one user. I am getting this error in our event log Event Type: Error Event Source: Server ActiveSync Event Category: None Event ID: 3005 Date: 3/7/2011 Time: 12:55:08 PM User: xxxxx\xxxxxxxx Computer: EXCHANGE Description: Unexpected Exchange mailbox Server error: Server: [exchange.xxxxx.local] User: [xxxxxxx@xxx.org] HTTP status code: [500]. Verify that the Exchange mailbox Server is working correctly. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. So right now I see the appointment in their Outlook but it is not showing in OWA. I tried changing the workstation from Cached Mode to Uncached mode, the result is the same. Any suggestions?

Hi Phill, If you are using cache mode, I suggest you change to online mode, create a new calendar appointment in Outlook, then check whether it can be shown in OWA. The error you got in event log(about Activesync) is very common, I suggest you run Exbpa to get more information. Here are two similar threads for you, hope these help: OWA not displaying all appointments that ARE showing in Outlook 2007 http://social.technet.microsoft.com/Forums/en-ZA/exchangesvrclients/thread/d981f216-11e8-4fc5-ba69-9a94b6f9ab88 E2K3, OWA calendar not showing appointment but Outlook does ... http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/3da4b960-c771-4273-a4a3-4cc53eeccc97 Resource: Microsoft Exchange Best Practices Analyzer v2.8 http://www.microsoft.com/downloads/en/details.aspx?FamilyID=dbab201f-4bee-4943-ac22-e2ddbd258df3&displaylang=en Thanks, EvanPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.