Reporting SendAs Audit Events for Exchange Online Mailboxes

The SendAs audit event is logged when someone uses the send as permission to send a message from an Exchange Online mailbox. The events are stored in the Office 365 audit log and can be found there with an audit log search. However, things aren’t as straightforward as they are on-premises because some other types of delegated messages turn up in searches. Fortunately, we have a script to help.

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Microsoft Pushes Removal of Basic Authentication from Exchange Online to Mid-2021

Covid-19 dealt a blow to Microsoft’s plans to remove basic authentication from 5 connection protocols for Exchange Online and forced them to postpone the removal from October 13, 2020 to sometime in the second quarter of 2021. The news is disappointing because basic authentication is a weakness exploited by many hackers. But you can’t plan for a pandemic and Office 365 tenants need more time to be ready for the deprecation.

Reporting Exchange Online Mailbox and SendAs/On Behalf Of Permissions

Exchange Online mailboxes support SendAs, Send on Behalf Of, and FullAccess permissions. A previous script focused on the FullAccess permission. This version covers all three. It’s also a good example of how you need to pay attention to property sets when writing PowerShell code to use the new Exchange Online REST-based cmdlets.

Reporting Exchange Online Folder Permissions

In addition to mailbox permissions, Exchange Online supports folder-level delegated permissions. Users can create folder delegations through Outlook desktop. Like mailbox permissions, it’s a good idea for tenants to check folder-level delegations to ensure that people don’t keep permissions for longer than they should. We explain how to create a PowerShell script to generate such a report.

Reporting Exchange Online Mailbox Permissions

Exchange Online makes it easy to assign delegated permissions for user and shared mailboxes. But permissions assigned to people might not be still necessary, so it’s good to do a periodic check. In this post, we describe a script to scan for permissions on Exchange Online user and shared mailboxes and highlight non-standard permissions in a report generated as a CSV file.

Why Default Mailbox Auditing for Exchange Online Isn’t Quite as Good as It Seems

Exchange Online enables mailbox auditing by default, which should mean that audit events get to the Office 365 audit log for all E3 and E5 mailboxes. Well, that’s what you might thing but that’s not what happens. Mailbox events for E5 mailboxes arrive just fine, but you must reenable E3 mailboxes for auditing before their events flow. It’s a bizarre situation.

Capturing “Crucial” Office 365 Audit Events Requires E5 Licenses

Microsoft has released information about high-value Office 365 audit events and audit event retention policies. Both are part of a Microsoft 365 Advanced Audit offering. The MailItemsAccessed event is the first high-value audit event (we can expect more) and the retention policies are used to purge unneeded events from the Office 365 audit log.

Why Basic Authentication for Exchange Online is So Bad

Some doubt that Exchange Online will disable basic authentication for five email connection protocols in October 2020. The refrain is that it will be too hard for customers. Well, it might be hard to prepare to eliminate basic authentication, but if you don’t, your Office 365 tenant will be increasingly threatened by attacks that exploit known weaknesses.

Add Your Personal Calendar to OWA

You can now add your personal Outlook.com or Gmail calendars to your work OWA calendar. The integration allows for only one personal calendar, and OWA synchronizes events from the personal calendar to make sure that people don’t schedule work events when you have personal commitments. TeamSnap calendars are also supported (real-only), but this feature is likely to not be used outside the U.S.