Hello, I have taken over an exchange 2013 hybrid setup with employees on premise and students on 365.  I have noticed there is a journal mailbox hat is using 340GB.  What are my best options to decrease this size.  I am new to journaling and am not even sure how you can access this journal mailbox if needed.  

Hi,

here are some info about journaling: https://technet.microsoft.com/en-us/library/aa998649(v=exchg.150).aspx

and here: https://technet.microsoft.com/en-us/library/dd298119(v=exchg.141).aspx

Good article about Journaling and Exchange online: http://windowsitpro.com/blog/why-exchange-online-hates-journal-mailboxes

I have actually already read through these as I hit up google before submitting to the forum.  But, my journaling was setup by my predecessor and it seems that it shouldn't be near this large.  I would like to shrink it down considerably whether that means trying to remove some of the older files somehow or what to do.  

• Edited by mactc 10 hours 53 minutes ago

I have actually already read through these as I hit up google before submitting to the forum.  But, my journaling was setup by my predecessor and it seems that it shouldn't be near this large.  I would like to shrink it down considerably whether that means trying to remove some of the older files somehow or what to do.  

• Edited by mactc Wednesday, June 03, 2015 8:35 PM

Hi,

Journal mailbox is user mailbox, so you can login this mailbox as user mailbox.

To reduce the size of Journal mailbox, you can use retention policy.

https://technet.microsoft.com/en-us/library/dd297955(v=exchg.150).aspx

To check the setting of Journal mailbox, use this command to get a summary list of all journal rules

Get-JournalRule

And use this command to check if it enables journaling for the mailbox database

Get-MailboxDatabase | fl JournalRecipient

Best Regards.

I have changed the retention policy for that mailbox to 1 Year Delete.  That should eventually delete everything from the mailbox older than a year correct?  It might take a couple of days?