I built a free, open-source M365 security assessment tool - looking for feedback
I work as an IT consultant, and a good chunk of my time is spent assessing Microsoft 365 environments for small and mid-sized businesses. Every engagement started the same way: connect to five different PowerShell modules, run dozens of commands across Entra ID, Exchange Online, Defender, SharePoint, and Teams, manually compare each setting against CIS benchmarks, then spend hours assembling everything into a report the client could actually read. The tools that automate this either cost thousands per year, require standing up Azure infrastructure just to run, or only cover one service area. I wanted something simpler: one command that connects, assesses, and produces a client-ready deliverable. So I built it. What M365 Assess does https://github.com/Daren9m/M365-Assess is a PowerShell-based security assessment tool that runs against a Microsoft 365 tenant and produces a comprehensive set of reports. Here is what you get from a single run: 57 automated security checks aligned to the CIS Microsoft 365 Foundations Benchmark v6.0.1, covering Entra ID, Exchange Online, Defender for Office 365, SharePoint Online, and Teams 12 compliance frameworks mapped simultaneously -- every finding is cross-referenced against NIST 800-53, NIST CSF 2.0, ISO 27001:2022, SOC 2, HIPAA, PCI DSS v4.0.1, CMMC 2.0, CISA SCuBA, and DISA STIG (plus CIS profiles for E3 L1/L2 and E5 L1/L2) 20+ CSV exports covering users, mailboxes, MFA status, admin roles, conditional access policies, mail flow rules, device compliance, and more A self-contained HTML report with an executive summary, severity badges, sortable tables, and a compliance overview dashboard -- no external dependencies, fully base64-encoded, just open it in any browser or email it directly The entire assessment is read-only. It never modifies tenant settings. Only Get-* cmdlets are used. A few things I'm proud of Real-time progress in the console. As the assessment runs, you see each check complete with live status indicators and timing. No staring at a blank terminal wondering if it hung. The HTML report is a single file. Logos, backgrounds, fonts -- everything is embedded. You can email the report as an attachment and it renders perfectly. It supports dark mode (auto-detects system preference), and all tables are sortable by clicking column headers. Compliance framework mapping. This was the feature that took the most work. The compliance overview shows coverage percentages across all 12 frameworks, with drill-down to individual controls. Each finding links back to its CIS control ID and maps to every applicable framework control. Pass/Fail detail tables. Each security check shows the CIS control reference, what was checked, what the expected value is, what the actual value is, and a clear Pass/Fail/Warning status. Findings include remediation descriptions to help prioritize fixes. Quick start If you want to try it out, it takes about 5 minutes to get running: # Install prerequisites (if you don't have them already) Install-Module Microsoft.Graph, ExchangeOnlineManagement -Scope CurrentUser Clone and run git clone https://github.com/Daren9m/M365-Assess.git cd M365-Assess .\Invoke-M365Assessment.ps1 The interactive wizard walks you through selecting assessment sections, entering your tenant ID, and choosing an authentication method (interactive browser login, certificate-based, or pre-existing connections). Results land in a timestamped folder with all CSVs and the HTML report. Requires PowerShell 7.x and runs on Windows (macOS and Linux are experimental -- I would love help testing those platforms). Cloud support M365 Assess works with: Commercial (global) tenants GCC, GCC High, and DoD environments If you work in government cloud, the tool handles the different endpoint URIs automatically. What is next This is actively maintained and I have a roadmap of improvements: More automated checks -- 140 CIS v6.0.1 controls are tracked in the registry, with 57 automated today. Expanding coverage is the top priority. Remediation commands -- PowerShell snippets and portal steps for each finding, so you can fix issues directly from the report. XLSX compliance matrix -- A spreadsheet export for audit teams who need to work in Excel. Standalone report regeneration -- Re-run the report from existing CSV data without re-assessing the tenant. I would love your feedback I have been building this for my own consulting work, but I think it could be useful to the broader community. If you try it, I would genuinely appreciate hearing: What checks should I prioritize next? Which security controls matter most in your environment? What compliance frameworks are most requested by your clients or auditors? How does the report land with non-technical stakeholders? Is the executive summary useful, or does it need work? macOS/Linux users -- does it run? What breaks? I have tested it on macOS, but not extensively. Bug reports, feature requests, and contributions are all welcome on GitHub. Repository: https://github.com/Daren9m/M365-Assess License: MIT (free for commercial and personal use) Runtime: PowerShell 7.x Thanks for reading. Happy to answer any questions in the comments.OAB download fails after hybrid mailbox move.
Hi folks, I'm posting this query here as I doubt anyone in the Outlook forums would have the necessary Exchange hybrid knowledge. I run a classic hybrid Exchange environment where Exchange Server 2019 CU15 is the on-premise platform. Authentication is provided by on-premise AD FS, with the accounts being synchronised from on-premise via AAD Connect. I've just moved my on-premise mailbox to Exchange Online via New-MoveRequest and for the most part, everything is fine. One thing that possibly isn't fine - going off the Bits-Client event log is the regular offline address book downloads, where I'm seeing regular failures in the event log and through double-checking with bitsadmin.exe. The initial address book synchronisation worked as the view in Outlook is fully populated, however, I expect that future changes likely won't come through. bitsadmin output Event log output (There's numerous events to choose from - this is the one I'm most curious about.) The BITS service provided job credentials in response to the UNIDENTIFIED authentication challenge from the outlook.office365.com server for the Microsoft Outlook Offline Address Book <guid> transfer job that is associated with the following URL: /OAB/<guid>/oab.xml. The credentials for the <sid> user were rejected. When the mailbox was on-premise, the OAB came from the Exchange Server - no surprise there, where post migration it can be seen from the bitsadmin output it now comes from outlook.office365.com. Perhaps that's also to be expected - I don't know, but it makes sense given the move. What alerted me to there potentially being an issue is the systray icon frequently gets stuck on the "synchronising" icon, and running a manual full OAB sync from within Outlook fails to complete. After an extended "hang" period, the sync window eventually times out with the error shown above (the protracted UI behaviour would appear to be due to the large number of retries). Dropping the BITS job URL into Edge simply returns a HTTP 503, which doesn't necessarily strike me as a problem. After all, I'm unable to provide a BEARER token using this method. I haven't yet tried via PowerShell as it only occurred to me now but perhaps I'll do so after posting this. Searching on this error and scenario has turned up nothing useful. I have also checked and compared event log entries from an Azure AD-native account, where it's a mixed bag of successful OAB BITS downloads and unsuccessful ones that feature the same symptoms as above, which offers up the possibility this might be a transient service-side error (though I'm not leaning heavily towards this). Has anyone else encountered this issue and resolved it? Is it even an issue to begin with, or is this expected behaviour? I'm unsure what to make of the symptoms. Cheers, Lain
Announcing Public Preview of Argo CD extension on AKS and Azure Arc enabled Kubernetes clusters
We are excited to announce public preview of the Argo CD extension for Azure Kubernetes Service (AKS) and Azure Arc-enabled Kubernetes clusters. As GitOps becomes the standard for deploying and operating applications at scale, enterprises need a way to implement GitOps while staying compliant with best practices for security and identity management. Argo CD extension delivers on this need across 3 pillars - Trusted Identity and Secure Access The Argo CD extension integrates with Microsoft Entra ID to provide a secure, enterprise-ready experience for: Secure authentication using Workload Identity federation to Azure Container Registry (ACR) and Azure DevOps. This removes the need for long-lived credentials or hard-coded secrets in Git Repos, moving your CD pipelines closer to a true zero-trust architecture. Single Sign-On (SSO) using existing Azure identities. Enterprise-Grade Hardening and Security This preview introduces several enhancements to improve your security posture: To minimize the attack surface, the extension’s images are built on Azure Linux, specifically engineered for reduced CVEs and improved baseline security. Opt-in to automatic patch releases to stay current on security fixes while maintaining full control over your change management processes. Parity with upstream Argo CD Argo CD extension is designed to remain fully aligned with the upstream Argo CD open‑source project, so teams can use Argo CD as they do today with support for Configuring Argo CD extension with High availability (HA) for production‑grade deployments of critical workloads. Using hub‑and‑spoke architecture for multi‑cluster GitOps scenarios. Application and ApplicationSet, enabling automated and scalable application delivery across large fleets of clusters. Getting Started We invite you to explore the Argo CD extension and provide feedback as we continue to evolve GitOps capabilities for Kubernetes. To get started today, you can enable the extension on your clusters using the Azure CLI. Argo CD extension management via the Azure Portal will be available in a few weeks.
Building Microsoft’s Sovereign AI on Azure Local with NVIDIA RTX PRO and Next Gen NVIDIA Rubin
This blog explores how Azure Local, in partnership with NVIDIA, enables governments and regulated industries to build and operate Sovereign AI within their own trusted boundaries. From enterprise AI acceleration available today with NVIDIA RTX PRO™ Blackwell GPUs to a forward‑looking preview of next‑generation NVIDIA Rubin support, Azure Local provides a consistent platform to run advanced AI workloads—connected or fully disconnected—without sacrificing control, compliance, or governance. Together with Foundry Local, AKS on Azure Local, and Azure Arc, customers can bring AI closer to sensitive data and evolve their Sovereign Private Cloud strategies over time with confidence.Azure Arc Server Feb 2026 Forum Recap
Please find the recording for the monthly Azure Arc Server Forum at YouTube! During the February 2026 Azure Arc Server Forum, we discussed: Arc Server Reporting & Dashboard (Jeff Pigot, Sr. Solution Engineer): Check out this awesome visual reporting bringing together different management services and experiences across Azure Arc-enabled servers on GitHub at Arc Software Assurance Benefits Dashboard. VM Applications (Yunis Hussein, Product Manager): Shared private preview experience and capabilities for 3P Application Deployment and Patching on Azure Arc-enabled servers. Please fill out this form to participate in Private Preview. Windows Server 2016 ESUs enabled by Azure Arc: Portal Experience Feedback (George Enninful): Please sign up on the feedback form. To sign up for the Azure Arc Server Forum and newsletter, please register with contact details at https://aka.ms/arcserverforumsignup/. For the latest agent release notes, check out What's new with Azure Connected Machine agent - Azure Arc | Microsoft Learn. Our March 2026 forum will be held on Thursday, March 26 at 9:30 AM PST / 12:30 PM EST. We look forward to you joining us, thank you!
