hello
i did find this out about it when looking into it for work:
The text below is edited from a microsft help article, (reference:
http://support.microsoft.com/?id=329931), which relates to the
'accept'/'decline' buttons being missing from meeting requests. Could you
possibly read through it and follow the instructions in the RESOLUTION
section:
SYMPTOMS
When you use Outlook 2002 to send a meeting request to another Outlook user,
it may not be displayed correctly on the recipient's computer. Although the
meeting request may arrive, it may not contain the Accept or Decline buttons,
and it may not be recognized by Outlook as a valid meeting request.
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CAUSE
This issue may occur if the meeting request is not sent through a Microsoft
Exchange server.
By default, Outlook 2002 sends meeting request in the iCalendar format. This
format is not transmitted correctly unless the message is transferred by an
Exchange server.
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RESOLUTION
To resolve this issue, configure Outlook to send meeting requests in the
vCalendar format: 1. Start Microsoft Outlook.
2. On the Tools menu, click Options.
3. Click the Preferences tab, and then click Calendar Options.
4. Click to clear the When sending meeting requests over the Internet, use
iCalendar format check box if it is selected, and then click OK.
************************************
If you do not have the above options because of the outlook version you are
using, you could try to send the meeting request in vcalendar format by:
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To Save an appointment in vCalendar format
In Calendar, create or open the appointment you want to save.
On the File menu, click Save As.
Do one of the following:
In the Save as type box, click vCalendar Format (*.vcs).
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(The above is taken/edited from microsoft outlook 2003 help).
Once you have saved in vcalendar format you can then send it as normal.
I think you said you are using 2003, in which case the second option is
possiby going to be of more use to you.
---- don't know if its any use to you - couldn't really try it out, as the
meeting requests which didn't work were coming from an external organisation
and i didn't have access to their outlook accounts!
my problem is i don't really know much about what ipm.post format is, i did
read somewhere that it might be do to with if an organisation uses a custom
form for their meeting requests - but i don't really know that much!
thanks for your reply