Office 365 shared mailboxes disappear in Outlook 2010.

Untill recently we used exchange 2007 for our mail (Windows server 2008 SBS). But now everything is transferred to Office 365. The owa part is working fine.

The mailbox which is configured is working perfect in Outlook 2010 after disabling Outlook anywhere on the sbs 2008 server.

But the problem are the shared mailboxes. They work perfectly when i'm NOT connected to the sbsserver. But when I use Outlook connected to the sbsserver the shared mailboxes will disappear after a while.

It has something to do with the new feature of exchange 2010 (=office365) which automatically adds shared mailboxes when you have al the needed rights.
But when I connected to the sbsserver it overwrites this feature en make the shared mailboxes go away.

What do i need to disable on the sbsserver to get rid of this problem?
ctrlcrewAsked:
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e_aravindConnect With a Mentor Commented:
During the time of the issue, can you access the OOF, Freebusy?? from your Outlook.
Can you double-check the Outlook "Test email autoconfiguration" when connected to the Internet? Is that working fine or facing any issues?

Reason:
When you connect to internet,...due to some DNS conflicts\confusions...the Autodiscover may go wrong?


Cheers
Aravind
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e_aravindCommented:
http://technet.microsoft.com/en-us/library/hh529924.aspx#BKMK_MailboxAutoMap
Mailbox Auto-Mapping
In Exchange 2010 SP1, Office Outlook 2007 and Outlook 2010 clients can automatically map to any mailbox to which a user has Full Access permissions. If a user is granted Full Access permissions to another user's mailbox or to a shared mailbox, Outlook, through Autodiscover, automatically loads all mailboxes to which the user has full access.


>> In O365, this features is visible
So the moment you switch from O365 to on-premise, during the next-autodiscover refresh cycle, those details are gone and pulled-out of the Outlook profile?

Cheers
Aravind
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ctrlcrewAuthor Commented:
Indeed when i'm just connected to the internet(NOT to the server), everything is fine. But when i'm connected to the sbs 2008 server after a while the shared mailboxes are gone.

So I have to turn off some kind of services in the sbs2008?
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