Powershell

We all have probably been there and developed a PowerShell script that took some fair amount of time until the execution completed, weren’t we? Of course one could argue and say that as long a script ‘works’ it is good enough but depending on the use case and environment a PowerShell script that runs 30 to 60 minutes exceeds the patience of most (IT) people and can also lead to increased costs. But what makes those kinds of scripts that awfully slow and can’t we just tweak them to run faster? ...

When you are new to RESTful APIs and want to start with Microsoft Graph to automate tasks in your Endpoint Manager tenant all the stuff about app registrations, access tokens, pagination and request headers can be quite confusing. In this post I want to show you a quick tip to kickstart your Microsoft Graph API experience. Requirements Cloud admin account with Intune Administrator role assigned Ability to install Modules from the PowerShell gallery JWT Just because you can’t see it… doesn’t mean it isn’t there: Due to the naturality of OAuth 2.0 and OpenID connect (these are the protocols involved for authorization and authentication in a cloud environment) we can capture short lived access tokens, also called Json Web Tokens (JWTs) directly from a browser. Tokens are usually valid between 50 and 60 minutes - just what we need to get some hands on with Microsoft Graph API and MEM automation. ...

App protection (also called MAM) policies have been around for a couple of years within MEM and I already used them in various projects to protect company data on unmanaged iOS and Android devices. One of the drawbacks with this approach is that we do not have full visibility about the usage and I tried to shed some light about this with a PowerShel reporting script that pulls data from the Microsoft Graph API. ...

Based on one of my older posts about PowerShell script signing with Azure DevOps I recently implemented a PowerShell script signing workflow with GitHub actions I wanted to share with the community. Prerequisites For this post the following prerequisites are required: Code signing certificate in PFX format GitHub account Add variables to GitHub actions Because GitHub variables can only be of string content we need to get the contents of the pfx file as base64 encoded string: ...

The Send-MailMessage cmdlet has been around for a couple of years and is mostly used to send email messages from PowerShell. But with the deprecation and security flaws of legacy authentication it’s time for a better option which actually supports modern authentication. For this purpose we can use the Microsoft Graph API and the Microsoft Graph PowerShell SDK. The best thing is that this solution works without any service account and does not need any exclusions from conditional access. ...

While fine-tuning and adjusting applocker policies for co-managed Windows 10 clients I got really annoyed by special characters commonly used in the German/Swiss language. The Intune portal seemed to use different encoding and didn’t allow me to just copy/paste the currently deployed policy and extend it with a new rule. I needed to request the original file that was uploaded to the tenant in order to adjust the rule. Instead of just accepting this I decided that it is time for an easier approach which I will share with you. ...

When working with the Microsoft Graph API or introducing the API to colleagues I often get asked about the steps required to obtain an access token for the API with PowerShell. Out in the wild, I’ve spotted many different ways and lots of implementations still relying on the ADAL (Active Directory Authentication Library) despite the fact that this client library is superseded by MSAL (Microsoft Authentication Library). So let’s talk about acquiring access token “in stile” with the most simple method available. ...

Too lazy to sign your PowerShell scripts? Yes of course it provides security benefits but performing the steps manually can be easily forgotten and re-signing needs to happen after every script change. Because I like CI/CD topics and have not found a solution on the internet I decided to build a solution based on Azure capabilities. Furthermore, I wanted a solution which does not require to hand out the code signing certificate to the respective script author which can be useful if you have a bunch of people writing PowerShell scripts. ...

While looking into the new Microsoft Defender Antivirus report available in MEM (Intune) I discovered some machines which did not report any recent Defender antimalware scans, despite configured via configuration profile. Of course, AV scans are kinda old-fashioned against rapidly evolving threats but a regular quick scan won’t hurt anyone. Instead of having a look at every single machine affected, I decided to try out the new proactive remediations feature which went globally available last week and let endpoint analytics do the detection and remediation work for me. As a reference, I used the Tutorial: Proactive remediations from Microsoft which covers the process quite well. ...

You always wanted to automate a specific action within Intune / the Microsoft Endpoint Manager Portal (MEM) but were afraid of the complexity? The Microsoft Graph API docs deliver you more questions instead of answers? Automating tasks within the MEM portal could be very easy, couldn’t it? I promise it will be much simpler with this magician trick. Microsoft Endpoint Manager Portal The MEM Portal UI relies on the Microsoft Graph API. This means that the UI where you create new settings and policies and the Intune backend are encapsulated with different layers. Communication between the UI and the backend happens with the Microsoft Graph API. With the developer tools we can trace network traffic and discover the request URLs and request body payload which are required to interact with the API. ...