IPhone Calendar invitations

I have an iPhone working with sbs2003 and exchange 2003, all contacts, email & and calendars synchronise just fine but I do have one small issue.
The issue is that when I try to delete a calendar invitation or appointment on the iPhone it won’t synchronise back to exchange / outlook, this is the only issue I am having and any help would be useful.
The issue has only just started and I have tried to restart and still I have the issue.
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Alan HardistyCo-OwnerCommented:
Check using OWA to see if the appointments are making it back to the server.  If they are not in OWA, then delete the account from the iPhone and then set it up again.  It sounds like the iPhone has gotten a little confused.

If they are in OWA, then the problem is with Outlook not picking up the changes, so delete and re-create the .OST file for Outlook.


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Mohammad Ishtyaq khatriSr. Systems EngineerCommented:
recreating your Iphone account will help
Alex_JenkinsAuthor Commented:
how t delete and recreat an OST?
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Alan HardistyCo-OwnerCommented:
Close Outlook, locate the .OST file which will vary depending on what version of Windows you have:

Windows XP
drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook

Vista / Windows 7

Delete the .OST file which will be named the same as the outlook profile name, then open up Outlook again and it will re-create the .OST file and suck down the contents of the mailbox from the server.
Alex_JenkinsAuthor Commented:
I dont understand I wanted to accept agentmik answer as this resloved the issue.

Alan HardistyCo-OwnerCommented:
If it resolved the issue - you should be accepting my initial post as this advised you to delete and recreate the account in the iPhone (comment ID http:#a35229574) and this was posted 18 minutes before agentmik's comment:

"If they are not in OWA, then delete the account from the iPhone and then set it up again"
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