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Deatherage

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Exchange 2003 SBS Mail Store unmounting

I am running Windows 2003 SBS and recently our exchange mailbox store has bee dismounting once a day.  I checked at it seems to be backing up properly can someone offer some insite as to how I can resolve this issue?

When I mount the mailstore it works fine for a day or two hen it cuts off again.
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mahdvic
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Need more info.  How big is the store?  what time is the store dismounting?  is it during the backup?  How much hard drive space is there available?
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Also what versions of Exchange std or enterprise?  What are the event ids genrated in the app logs when the stores dismount?
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Deatherage

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I am running MS SBS but I looked in the event viewer app and there is an error stating I am exceeding my 18gig limit. and the store will be dismounted.  If I install Exchange service pack 2 will it increase my database size to 75 gigs?
Exchange 2003 with no service packs? Upgrade to SP2 its very easy and will fix the issue.:

http://technet.microsoft.com/en-us/exchange/bb288486.aspx
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Glen Knight
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If your store has reached it's 18GB limit you already have SP2 installed (prior to SP2 the limit was 16GB) and all you need to do is add the registry keys in the link I posted above and restart the Microsoft Exchange Information Store service.
If the store is dismounting once per day and is then able to be remounted then this is because it has reached it's soft limit, therefore Comment ID: http:#26163180 is the correct answer.