[Evolution] Microsoft outlook calendar booking in Evo?

[Svante R Signell <srs kth se>]

When receiving a calendar booking for Microsoft Outlook I get the
following response:

---------
Exchange 2007 IMAP4 server failed to retrieve the following message:

Subject: "subject_title"
From: "xx yy")
Sent Date: 2008-09-30 10:13:27

The message could not be retrieved using the IMAP4 protocol. The message
has not been deleted and may be accessible using either Microsoft
Outlook or Microsoft Office Outlook Web Access. You can also try
contacting the original sender of the message to find out about the
contents of the message.

Retrieval of this message will be retried when the server is updated
with a fix that addresses the problem.
---------

Is Microsoft Outlook Calendar bookings not supported in Evo or is it due
to IMAP?

Thanks!