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Thank you,I found what i was searching.<br />
With some modifications I was in need for &nbsp;this, in case someone will need it in the future:<br />

<pre><code id="code-102778">Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | ft DisplayName,@{label=&quot;TotalItemSize(KB)&quot;;expression={$_.TotalItemSize.Value.ToKB()}},ItemCount &gt; mailboxes.txt
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We have an Exchange 2007 and I have a question.How the syntax should be so that i can see any mailbox which is over a certain size,let's say 30 MB?If there is a way to see all the mailbox sizes with Exchange Management Console i'd be happy to know,if not then i'm ok with only the command for the Shell.Thank you.
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We have an Exchange 2007 and I have a question.How the syntax should be so that i can see any mailbox which is over a certain size,let's say 30 MB?If there is a way to see all the mailbox sizes with Exchange Management Console i'd be happy to know,if not then i'm ok with only the command for the Shell.Thank you.

Thank you,I found what i was searching.
With some modifications I was in need for  this, in case someone will need it in the future:

Need help with get-mailboxstatistics command

We have an Exchange 2007 and I have a question.How the syntax should be so that i can see any mailbox which is over a certain size,let&#39;s say 30 MB?If there is a way to see all the mailbox sizes with Exchange Management Console i&#39;d be happy to know,if not then i&#39;m ok with only the command for the Shell.Thank you.

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

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.