Database Size



Hi,

we are Using Exchange Server 5.5
Total Mailbox 1000
Mailbox size is 20 MB Each

but Private information store size is 10.4 GB and when i am using Eseutil
for database defragmentation it reduce to 9.4 GB how is it possible.

According to genral calculation if we are having 1000 mailbox X 20 MB Each=
2 GB Total Size

Why size is too big


.



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