You have to configure Outlook Web App to allow XML attachments so that you can access the exported audit log. However, Outlook Web App blocks XML attachments by default. When you export the mailbox audit log or administrator audit log, Microsoft Exchange attaches the audit log, which is an XML file, to an e-mail message. $UserMailboxes = Get-mailbox -Filter Configuring OWA to accept XML Attachments To enable mailbox auditing, you run this command: Set-AdminAuditLogConfig -AdminAuditLogAgeLimit 913.00:00:00 (this increases the retention to 2 years and 6 months) Auditing Mailbox (non-owner mailbox access) For more information, see View the admin audit log in Exchange Online. Admin audit log: The admin audit log records any action (based on standalone EOP PowerShell cmdlets) by an admin or a user with administrative privileges. You can increase or decrease this with the AdminAuditLogAgeLimit command: For more information, see Search the role group changes or administrator audit logs in Exchange Online. Set-AdminAuditLogConfig -AdminAuditLogCmdlets *īy default, Exchange will keep the logs for one year before the oldest events are automatically deleted. To enable Administrative Auditing, you run this command: That would save the Admin from trying to run the report, getting blank results, and then having to search for this article to enable auditing. Wouldn’t it be nice if Microsoft adds a button on this page for Administrators to enable auditing without having to run any powershell commands? It could detect that auditing is not enabled, and alert the Administrator with an option to enable. Fun Fact: This auditing is available by default with Exchange Online. This is because auditing is not enabled by default with Exchange 2010 on-premise. By default, Exchange runs the report for non-owner access to any mailboxes in the organization over the past two weeks. Click Run a non-owner mailbox access report. In the EAC, navigate to Compliance Management > Auditing. She has a SANS/GSEC certification in security and prefers Heavy Duty Reynolds wrap for her tinfoil hat.So you have Exchange 2010 but when you run the reports in the Exchange Control Panel (ECP) you don’t get any results. Step 2: Use the EAC to run a non-owner mailbox access report. She blogs at and is on twitter at She lurks on Twitter and Facebook, so if you are on Facebook with her, she really did read what you posted. In addition, she provides forensic computer investigations for the litigation consulting arm of the firm. In real life, she’s the IT wrangler at her firm, Tamiyasu, Smith, Horn and Braun, where she manages a fleet of Windows servers, Microsoft 365 deployments, Azure instances, desktops, a few Macs, several iPads, a few Surface devices, several iPhones and tries to keep patches up to date on all of them. She writes the Patch Watch column for, is a moderator on the listserve, and writes a column of Windows security tips for. Susan Bradley has been patching since before the Code Red/Nimda days and remembers exactly where she was when SQL slammer hit (trying to buy something on eBay and wondering why the Internet was so slow). Remember, you can set up alerts for activity in this area as well. If you are interested in learning more about auditing, there are several resources, including an online ebook Office 365 for IT pros and various documents on the Microsoft site. Once you have enabled the auditing, it takes a few hours before it’s active. MicrosoftĬlick on “Learn more about search and investigations.” If you find that auditing is not enabled, enable it as soon as possible. You can do this via PowerShell or go to the Security and Compliance Center, then go to “Search & Investigation,” select “Audit log search” and then review your settings. This has long been a key request from forensic investigators to assist in mail investigations.īefore that, of course, you need to review your current auditing settings. Microsoft Exchange Online Management Microsoft Exchange Online: A Microsoft email and calendaring hosted service. but Search-AdminAuditLog doesnt show any entry of the Set-CalendarProcessing cmdlet. Starting February 1, Microsoft will add auditing to track mail reads by default. I have enabled admin audit log for this Set-CalendarProcessing cmdlet. Ensuring that audit logs are enabled for Microsoft Office 365 can help you investigate and determine exactly how, why, when and possibly who did what (including, but not limited to, questions from management) when conducting forensic investigations of attacks.
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