iPhone Contacts, Mail and Appointments from Activesync disappear when Exchange server is offline

Hi,

We run SBS 2003, and use Exchange Activesync to synchronise contacts, calendars and messages to our iPhones while we're out of the office.

However, in the rare instances of our Exchange server going offline, all contacts, appointements and messages disappear from our phones.

Is there a way we can set them up to leave them on the phone even when the exchange server is offline? Obviously they don't disappear when there is no signal, so it must be an activesync setting.

Thanks,
djlr2008Asked:
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debuggerauCommented:
sounds like the email server dropped the message store and resync the users with empty mailboxes, as when our exchange server goes offline, they can all access their items..

And, as you said, if you loose internet access (which is effectively offline), the messages remain..
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djlr2008Author Commented:
Yes, I think that's what's happening.

Do you know how to stop it?
Should I stop the Exchange site in IIS?

Thx,
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debuggerauCommented:
Stop exchange going offline?

Stop IIS, in a word,  no..
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djlr2008Author Commented:
No, to clarify:

I would like to stop the mail server from syncing empty messages, contacts and calendars with these devices. When I stop exchange services, or dismount the mail store, the syncing process should stop as well, so that it does not wipe our iPhones. Our iPhones should just behave as they do when they are in Flight mode, or lose their mobile connection to O2. When this happens, they don't just wipe all their exchange data!

I suggested one solution: stopping IIS before any exchange maintenance, as Activesync relies on IIS to synchronise with exchange.

However, I was wondering whether there is a way I could configure Activesync or Exchange System Manager to resolve this issue.

Thanks,
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debuggerauCommented:
ok, I see.  For maintenance etc..

But if I was going to stop the exchange services, I'd use the procedure MS published.
http://technet.microsoft.com/en-us/library/aa996649(EXCHG.65).aspx

That way none of the other services would be active to replicate empty contents.
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mfcunsCommented:
What about when there is an unplanned outage?
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