We have a requirement to trigger automatic email if particular mailbox's itemcount exceed particular No.

How to do via Exchange monitoring

We have a requirement to trigger automatic email if particular mailbox's itemcount exceed particul

Above suggested powershell looks good to resolve your purpose.

If you want to receive notification automatically, you may also try this automated solution (http://www.exchangereports.net/) that could be a good alternative choice in your situation.

Hi,

How about the issue?

Please refer to the script given by Hinte to achieve your goal.

In addiction, we can use the following command to configure the mailbox:

Set-Mailbox <mailbox> -UseDatabaseQuotaDefaults $false -IssueWarningQuota 8GB -ProhibitSendQuota 8GB

https://technet.microsoft.com/en-us/library/aa998353%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396

Regards,

David