PowerShell Archives - Ru Campbell MVP

Reauthorise Windows Server DHCP with One Line of PowerShell

This will be a brief blog, as I am certainly not a DHCP expert or day-to-day administrator. I do, however, run a DHCP server on Windows Server 2019 constantly in my lab environment, but sometimes encounter a problem whereby the server is no longer authorised, and when I use the GUI to do so, I get the error the specified servers are already present in the directory service. The PowerShell I use to resolve…

Microsoft 365 Microsoft Defender Microsoft Defender for Endpoint Microsoft Defender XDR PowerShell

Microsoft Defender Antivirus – Schedule & Install Updates via Network Shares

Although not common, there are scenarios out where you will have LAN-only devices onboarded in Microsoft Defender for Endpoint (MDE), or at least using Microsoft Defender Antivirus (MDAV). With no line of sight to the internet, you can use options such as WSUS, but in this blog, I'll explore using a network share, as WSUS isn't always an option. Set up the network share for updates 1. Create a directory on your file server…

Application Guard Intune Microsoft 365 Microsoft Defender News Office 365 PowerShell Windows

Understanding Application Guard for Office, Now Generally Available

Application Guard first appeared in Windows 10 1709 ("Fall Creators Update") to isolate Edge browser activity within a Hyper V container. Microsoft now extends that same idea to Word, Excel, and PowerPoint in Office 365 ProPlus Microsoft 365 Apps for Enterprise on Windows 10... ... if you have Microsoft 365 E5 or E5 Security. You knew that was coming! With Application Guard for Office, your files can open in a sandbox without access local…

BitLocker Entra ID (Azure Active Directory) Intune Microsoft 365 Microsoft Intune PowerShell Windows

Store BitLocker Recovery Keys in Azure AD for Devices Already Encrypted

As you move from on-premises or third-party infrastructure to Microsoft 365 and Azure AD, you will want to keep those BitLocker recovery keys safe. You can store those keys either in on-premises Active Directory or in the cloud with Azure AD. The behavior of the BitLocker / Azure AD relationship is that the recovery keys will only be stored against the device object in Azure AD if the encryption happens when the device is…

Exchange Online Office 365 PowerShell

PowerShell: Run Cmdlet If Another Was Successful (And Keep Trying Until It Is)

Today I'm sharing a useful bit of PowerShell I gracelessly punt from script to script whenever I need to make sure a prerequisite it met before running something and to keep checking until it's met, then run what I need: "do X when Y is ready and keep checking Y until it's ready". The original use for this was my script to create a new Microsoft 365 user, but hold off on some parts…