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system Exchange mailboxes are smaller then the .edb database

Posted on 2012-08-15
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Last Modified: 2012-09-03
Hi Experts,

I am going to do an offline defrag of my exchange server. What i want to know i this:

Why is it that when i add up my databases in system manager it comes to around 16gb but the associated .edb database is showing 70GB. I am unsure why this is so.

I have been battling with the limit of 75GB on a small business server 2003 std edition. I may upgrade to sbs 2011 giving me 1tb of space however i need to have this working now while budget can come through.

I have made sure that there is no retension of e-mails and have set everyones to 0 days.

I can see that from event id 1221 i would only gain 299mb.

I cant see why the database is displaying so big but when you add it up it cant be.

Public store is fine but private is my problem.

My director left for another branch 1 year ago and he had a 16gb database. When i removed his account i got back about 7gb. Again why is this so. I have done an offline defrag.

Can someone explain how this all works?

Thank you
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Question by:DCHMIEL
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Expert Comment

by:Manpreet SIngh Khatra
ID: 38297250
Ideally .edba nd .stm also have some free space and dumpster thats not seen in ESM user mailbox size or Outlook.

To check with white space you can check eventID 1221 on the server.
Dumpster is called "Recover Deleted items"

Offline defrag makes total sense :)

- Rancy
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Expert Comment

by:Manpreet SIngh Khatra
ID: 38297267
When you removed his account was it disconnected or Purged ?

Also how many Disconnected Mailboxes do you have and its size ?

- Rancy
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Author Comment

by:DCHMIEL
ID: 38299564
ok you got me thinking here.

Firstly to answer your question i think i would have purged it. I ran clean up agent on exchange and no disconnected mailboxes were highlighted.

I am worried this is not a true reflection of the situation. I have read about instances that exchange does not show it.

Do you Know of another way script or otherwise that will show if there are any disconnected mailboxes in my exchange server that have not yet been deleted. It would make sence.

I am planning a offline defrag this weekend but event id 1221 is only showing around 299mb of free space - seems hardly worth it!

Thank you
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LVL 2

Author Comment

by:DCHMIEL
ID: 38304124
Hi there,

With me doing the defrag tomorrow i was wondering if there was anything else someone could suggest? Is there a way i could see if all mailboxes in the past have been removed properly?

Thanks
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LVL 52

Expert Comment

by:Manpreet SIngh Khatra
ID: 38306916
No such script ideally it shwos in ESM and we see it refect the same in 1221 on the day after the purge.

Look check the limit for purging emails and mailbox on the properties of the Mailbox database on Limits Tab.

- Rancy
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Author Comment

by:DCHMIEL
ID: 38319362
HI guys,

Wanna wrap this up soon/ I just dont get how this all works. Event 1221 showed 299mb free to gain. When i did my offline defrag i reduced it by 9.6gb.

SO not sure why is only shows 299mb to gain.

Ill leave this open for a few days to see if anyone can shed some light on my question otherwise will close in a few days,

thanks for responses so far.
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Accepted Solution

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Manpreet SIngh Khatra earned 2000 total points
ID: 38321259
You get a 1221 for every database .... so you will have one for Mailbox and PF database. The event disciption tell you which database is it for and one or multiple could be generated for each server everyday ..... Hope we are checking for the Mailbox database and not PF as there is no way if 1221 says 299MB we can get 9+GB after Offline defrag :(

- Rancy
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