Exchange on SBS - Error - Event ID 9175

I'm having an intermittent problem where email is queuing in the Local Delivery folder (2 or 3 mornings a week) - force connection and restart of the Information Store service temporarily resolves the problem.  Event Manager reports the following -

Source: MSExchangeSA Category: MAPI Session Event ID: 9175

The MAPI call 'OpenMsgStore' failed with the following error:
The attempt to log on to the Microsoft Exchange Server computer has failed.
The MAPI provider failed.
Microsoft Exchange Server Information Store
ID no: 8004011d-0512-00000000
t38Asked:
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jerseysamCommented:
I have seen this when you are close to the mailstore size limit.

If exchange SBS then you will need to increases the size via the registry change:

 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<Servername>\Private-GUID

Create a DWORD entry by right-clicking on the folder and selecting NEW > DWORD Value

Enter a DECIMAL value of anything between 18 and 75 (making sure that it is not larger than the free space on the drive where your store resides)
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t38Author Commented:
Thanks - will try that and revert.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
What version server are you running?  because the above suggestion may not apply.

Also, how much overhead is there on the disk that contains your Exchange database?  ie, what is total disk/volume size and how much free space?

Jeff
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