Exchange 2013 - Mailbox Access Audit (without auditing enabled)

Hi

Environment:
Windows 2008 R2 (functional level)
Exchange 2013 / 2010 / 2007 (mailboxes on 2013)

My question is, is there a way to audit mailbox access (historically) without mailbox auditing having been enabled.

I had been looking for errors like 1016 but they seem to not be relevant in Exchange 2013.
What event ID's are logged in Exchange 2013/ Windows 2008 R2 GC/DC's for mailbox access by a non-owner (I have searched online but cannot seem to find anything).

I have the potential that someone has been accessing mailboxes and I need to find explicitly the logs that they indeed have - As a non-owner.

Alternatively, is there a way to prove that no non-users have sent email from a mailbox.

Thanks in advance
bry
bryan oakley-wigginsSenior Cloud EngineerAsked:
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AmitIT ArchitectCommented:
I don't see any other way. Any reason for not enabling it?
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bryan oakley-wigginsSenior Cloud EngineerAuthor Commented:
HI Amit

Thanks, my thoughts exactly and why I have struggled up to know - I was trying to look at log's on DC's/EX to see any particular Event ID's to state mailbox logon and by whom (like previous versions event id 1016 etc) - Unfortunately it's to determine historical (recent) possible mailbox access, so enabling it now wouldn't bring any benefit to my current requirements (although it looks as though mbx auditing will be enabled going forward).

I am unable either to use mfcmapi to detemine sent by/sent-as, as I do not have the endpoint message data to look through.

I could potentially get a source IP from the message tracking log as well as checking the cmdlets log to see if any spurious changes were made.

Does Exchange 2013/10 not have at least a minimum set of event's at default to log activity?

Thans for your reply though anyhow, much appreciated.

Cheers
Bry
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AmitIT ArchitectCommented:
Unfortunately there is no such logging enabled by default, you need to enable it first.
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bryan oakley-wigginsSenior Cloud EngineerAuthor Commented:
Hi Amit

Ok, well I guess you answered my question, so only appropriate I accept as solution.

Thanks
Bry
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