The "All Day" field is marked with "No" when you access a meeting request that has a duration time that is more than 24 hours by using a mobile client through ActiveSync in an Exchange Server 2007 environment
You access a mailbox which is hosted on a Microsoft Exchange Server 2007 server by using a mobile client through ActiveSync.
The mailbox has a meeting request that has a duration time that is more than 24 hours.
In this scenario, the mobile client does not treat the meeting request as an all day event meeting request. Additionally, the All Day field is marked with "No". However, if you access the mailbox by using Microsoft Office Outlook, the all day flag of the meeting request in Outlook client is set correctly.
This problem occurs because Exchange Server 2007 misses the scenario that an all day event meeting request spans across multiple days in the ActiveSync component.
To resolve this problem, install the following update rollup:
2407025 Description of Update Rollup 2 for Exchange Server 2007 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.