Exchange 2013 Database Size didn't reduction after user move another DB.

Hi, I have two Exchange Server Ex01, Ex02 and two database DB1 and DB2. Already we move few user DB1 to DB2 but DB1 database size didn't reduction after move user. 
Md. Ramin Hossain

Hi ,
If you delete or move a mailbox from a database will not create a free space on that database.Instead a white-space will be created on that database during the online defragmentation and that will not make any changes on the physical size of the database
.Then that white-space will be used when a new mailbox is created on that same database.
In case if you wanted to convert those white space to free space then you need to do an offline defragmentaion and that will make the physical change in the size of the database
Note : For offline defragmentation we should have the database to be in a dismounted state.
Command for offline defragmentation : 
eseutil /d "path of the edb file"
But my suggestion would be to move the mailboxes to the newly created database instead of doing the offline defragmentation to attain the free space .Because it would take too much of time for the large databases to get completed.
Reference link for offline defragmentation : 
http://exchangeserverpro.com/defrag-exchange-2010-mailbox-database/
Command to see the white space on the mailbox database :
ESEUTIL /MS "path of the edb file"
To execute the above we need the database to be in a dismounted state.
Reference Link : 
https://social.technet.microsoft.com/Forums/office/en-US/4059c686-7c02-483b-9b15-891ca55295fe/running-the-eseutil-command-on-each-exchange-database-to-verify-database-whitespace?forum=exchangesvrgeneral
Please reply me if anything is unclear.
Thanks & Regards S.Nithyanandham

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