Configuration

DLP for Bitcoin Addresses

One of the up-and-coming combination phish-ransom attacks is to trick the mark into thinking that you’ve got access to their data, and then get them to send money to a Bitcoin address to protect them from data leakage.  You can create a DLP rule in the Office 365 Security & Compliance Center (or an Exchange Online transport rule) to try to combat this.… [ Continue reading ]

Information

WhoAmI for Office 365

If you’ve ever struggled to find out who your current session is logged in as when you connected to Office 365, here’s a tidbit to shed some light on it:

(Get-PSSession |?{$_.ComputerName -like “*outlook.com”})[0].RunSpace.ConnectionInfo.Credential.UserName

You can also use RunSpace.OriginalConnectionInfo.Credential.UserName. … [ Continue reading ]

Information

Update to the Get-UserHoldPolicies Tool

A new year, a new update for Get-UserHoldPolicies!  Woo!

I stumbled across some additional information today regarding deciphering hold policies for mailboxes while troubleshooting another issue and decided to update my Get-UserHoldPolicies tool to reflect it.

The core pieces that I added:

  • Identifying Skype policies (as prefaced by sky in the InPlaceHolds property of a mailbox)
  • Identifying excluded mailbox policies (as prefaced by -mbx in the InPlaceHolds property of a mailbox)
  • Disposition action for items at the end of a retention period:
    • Delete only
    • Do nothing after retention period
    • Delete after retention period

You can see a few of the new options here. … [ Continue reading ]

Configuration

SharePoint Online and OneDrive for Business Custom Sharing Controls

Today, we’re going to explore two relatively new sharing controls in SharePoint Online (and, by extension, OneDrive for Business).  The two options we’re going to look at are located inside the SharePoint Admin Center (https://<tenant>-admin.sharepoint.com) under Sharing:

Overview

To test both of these functions out (as well as how other users are affected), I’m going to work with 3 test users and two security groups.… [ Continue reading ]

Information

Determining your Office 365 Tenant Location

During a conversation with my peers, the discussion came up on how to determine what environment a tenant is located in (usually between Commercial and Government).  Typically, the easiest way to determine this is to look at your account SKUs.  For example, from PowerShell, the cmdlet Get-MsolAccountSku will return a list of SKUs available in your tenant.… [ Continue reading ]

Configuration

Creating Scoped DLP rules with Custom Sensitive Information Types

A few weeks ago, I put out a series of posts on creating and using custom sensitive information types (https://www.undocumented-features.com/tag/sensitive-information-types/).  The blog, posts, however, focus on using the DLP configuration options available in the Security & Compliance Center.

Rules created via the DLP wizard in the Security & Compliance Center have the benefit of being able to be applied globally across your organization and its content sources. … [ Continue reading ]

Configuration

Looky, looky! Custom sensitive information types with even more customitivity!

So, of course, as soon as I finish up posting a few entries (here and here), we go and release a new UI to help you get it done on your own!

You can do most of the effort of creating a data classification here, although if you want to use any of our built in functions (such as credit card Luhn check), you’ll need to export/modify/import, use the sensitive information type package that I created (referenced earlier) or use one of our native DLP classifications.… [ Continue reading ]