This has cropped up a few times at different sites over the past few weeks, so I thought I would post it here for quick reference.
Exchange mailbox stores were shutting down on a daily basis. This was affecting iPhone, which apparently “wipe out” the data (i think the data becomes unavailable), when there is no connection to the Exchange server. To workaround this, switch of the “push” action for email collection on the iPhone. This will also significantly increase the battery life if you nromally receive a lot of emails.
To increase the size of the Exchange mailbox store from it’s default of 18GB, do the following.
For a mailbox store, go to the following key in the registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\Server name\Private-Mailbox Store GUID
For a public folder store, go to the following key in the registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\Server name\Public-Public Store GUID
Create a New DWORD Value, “Database Size Limit in Gb” and set it between 1 to 75 as required. The default is 18 (of course).
Restart the MS Exchange Information Store service.