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Are your databases oversize? &nbsp;I think though if that were the case they mount for a while then unmount again. &nbsp;It may be worth running isinteg as shown in <a href="http://www.msexchange.org/tutorials/Exchange-ISINTEG-ESEUTIL.html" rel="ugc">http://www.msexchange.org/tutorials/Exchange-ISINTEG-ESEUTIL.html</a>.<br />
Also are there any other events in the Application log?
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Are your databases oversize?  I think though if that were the case they mount for a while then unmount again.  It may be worth running isinteg as shown in http://www.msexchange.org/tutorials/Exchange-ISINTEG-ESEUTIL.html [http://www.msexchange.org/tutorials/Exchange-ISINTEG-ESEUTIL.html].
Also are there any other events in the Application log?

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Event ID: 9175. SOURCE: MSExchangeSA-The MAPI call 'OpenMsgStore' failed with the following error: The Microsoft Exchange Server computer is not available.<br />
<br />
Event ID: 9518 Error Oxffffde1 starting Storage Group/DC=
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Event ID: 9175. SOURCE: MSExchangeSA-The MAPI call 'OpenMsgStore' failed with the following error: The Microsoft Exchange Server computer is not available.

Event ID: 9518 Error Oxffffde1 starting Storage Group/DC=

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Have you tried giving the server a reboot? I know thats probably a daft question, but worth checking.
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Have you tried giving the server a reboot? I know thats probably a daft question, but worth checking.

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Yes the server has been rebooted, but still unable to mount database
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Yes the server has been rebooted, but still unable to mount database

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Unable to mount Mailbox Store and Public Folder Store. Receiving an internal processing error. How do I resolve this issue?
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Unable to mount Mailbox Store and Public Folder Store. Receiving an internal processing error. How do I resolve this issue?

How do I mount information store, if it will not allow me?

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Project Management

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

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