Microsoft has quietly pushed Windows 11 version 26H2 into early Insider testing, the company confirmed in its June 2026 Windows IT Pro recap. The milestone signals that the next major feature update for Windows 11 is already taking shape, even as enterprise administrators face a cascade of security and infrastructure changes set to hit in the coming weeks. The recap, a monthly digest aimed at IT professionals, also revealed that Windows 365 is gaining new capabilities for developers and AI agents, and that IT admins must prepare for July changes that will begin the deprecation of Kerberos RC4 encryption. Simultaneously, print infrastructure is set for a modernization overhaul that could disrupt legacy workflows.

The convergence of these announcements paints a picture of a Windows ecosystem in motion: cloud integration deepens, AI becomes a first-class citizen, and security posture is tightening against long-exploited attack vectors. For organizations still clinging to older protocols and drivers, the next few months will demand swift action.

Windows 11 26H2: Early Signs of What’s Next

Details on 26H2 remain sparse, but the Insider debut confirms Microsoft is sticking to its annual feature update cadence. The H2 release has traditionally been the more substantial update of the year, following a minor H1 enablement package. Given the trajectory of Copilot+ and the industry’s pivot toward on-device AI, 26H2 will likely bring enhanced neural processing unit (NPU) utilization, deeper integration of AI into the shell and inbox apps, and quality-of-life refinements across the desktop. Microsoft’s recent emphasis on “AI PC” experiences suggests that 26H2 could further blur the line between local and cloud processing, enabling scenarios like real-time translation, intelligent content summarization, and adaptive user interfaces.

For enterprise IT, the Insider program offers an early testing ground. Microsoft historically funnels early code through the Dev and Canary channels, where features may be unfinished or ultimately scrapped. IT admins should enroll a subset of test devices now to validate line-of-business applications, drivers, and security tool compatibility. Past feature updates have disrupted VPN clients, printing subsystems, and virtualization platforms—regressions that are far easier to mitigate when caught months before broad deployment.

The insider builds also give Microsoft a feedback loop on the kernel and security hardening changes that ship alongside new features. With each release, the company has incrementally removed legacy components and enforced modern defaults. 26H2 is expected to continue that trend, potentially eliminating decades-old subsystems or enabling virtualization-based security (VBS) by default on capable hardware. Early testers can gauge the performance impact and prepare remediation steps.

Kerberos RC4 Heads for the Exit

Perhaps the most urgent item in the June recap is the countdown to Kerberos RC4 deprecation. Microsoft has long signaled its intent to retire the RC4-HMAC encryption type in Kerberos authentication, citing vulnerability to offline brute-force attacks and pass-the-ticket exploits. The recap indicates that July 2026 cumulative updates will introduce changes that “IT admins must prepare for.” Likely, this means the updates will mark RC4 as deprecated and activate an audit mode that logs every authentication attempt relying on the weak cipher.

RC4 has been a staple of Windows authentication since the Windows 2000 era, but its weaknesses are well-documented. Kerberoasting attacks, for example, extract service tickets encrypted with RC4 and crack the underlying passwords offline, often in minutes if the password is weak. By shifting exclusively to AES-256 encryption, Microsoft can close this avenue and force attackers to adopt noisier lateral movement techniques. The ultimate goal is to disable RC4 entirely in a future Windows release, but the transition requires careful phasing.

The typical deprecation playbook starts with an audit phase, where RC4 usage is flagged but allowed. July’s patch will likely add new event IDs—possibly in the 4768-4773 range—to the security log, giving admins visibility into which accounts and services still rely on RC4. A later update may enforce a “deny” policy by default for accounts that haven’t explicitly opted in, and eventually remove RC4 from the negotiated encryption list entirely.

The impact can be far-reaching. Many legacy applications, network appliances, and Linux-based services joined to Active Directory domains use RC4 out of the box. Service accounts with static passwords, custom-built line-of-business apps, and older Windows Server versions that haven’t been configured for AES are all at risk. If an application tries to authenticate and is forced to use AES but wasn’t coded for it, authentication will fail silently, leading to mysterious outages.

To prepare, IT teams should immediately begin auditing their environments. PowerShell’s Get-ADUser and Get-ADComputer cmdlets can reveal which accounts do not have the AES attribute set. Domain controllers can be monitored for RC4 ticket-granting events. Microsoft’s Kerberos Configuration Analyzer tool or third-party solutions can simplify the sweep. All service accounts should be updated to support AES, and developers must ensure their code uses the Negotiate or Kerberos API without explicitly requesting RC4. Organizations that have already migrated to managed service accounts (gMSAs) will be in a better position, as those natively support AES.

Printing Changes: A New Chapter in an Old Struggle

Printing has been a perennial pain point, and Microsoft’s June recap signals another push to break the industry’s reliance on legacy drivers. While specific details are thin, the direction is unmistakable: protected print mode and Universal Print are becoming the strategic path forward, and July changes may restrict the installation of legacy third-party drivers by default on Windows 11.

Protected print mode, first introduced in Windows 11 2023, uses the Internet Printing Protocol (IPP) and strips away the need for kernel-mode drivers. It confines print jobs to a sandboxed, user-mode process, dramatically reducing the attack surface. Many of the most damaging Windows vulnerabilities—from PrintNightmare to the recent spate of spooler bugs—exploited the legacy print spooler running with system privileges. By switching to IPP-based printing, those avenues are sealed off.

The July changes may include new Intune policies that allow IT to block legacy driver installation or enforce Universal Print configuration centrally. This shift will be painful for organizations that depend on specialized printers with unique finishing options, secure print release, or complex workflows tied to vendor drivers. However, major printer manufacturers have been building IPP-compliant solutions, and Microsoft’s Universal Print connector can bridge the gap for older devices that lack native IPP support.

IT admins should start inventorying their printer fleet, identifying which models can be transitioned to IPP and which require the connector. Testing should begin immediately to ensure that critical print workflows—like check printing, label printing, and archival document production—continue to work under protected print mode. Intune’s reporting capabilities can help map which clients are still using legacy drivers, and conditional access policies might eventually require protected print before allowing access to corporate resources.

Windows 365: Developer Playground and AI Agent Hub

Beyond the on-premises changes, Microsoft is positioning Windows 365 as a pivotal platform for development and AI workloads. The “developer capabilities” mentioned in the recap suggest a deeper integration with Visual Studio and Dev Box, Microsoft’s developer workstation service. Windows 365 could soon enable developers to spin up Cloud PCs pre-loaded with the complete .NET development stack, GitHub Copilot, and Azure toolchains—all accessible from a web browser or a thin client.

More intriguing is the promise of AI-agent capabilities. As enterprises experiment with autonomous software agents that automate tasks like data extraction, customer service, or compliance monitoring, a secure runtime becomes essential. Windows 365 Cloud PCs offer a controlled, auditable environment where agents can operate 24/7 without exposing corporate data to uncontrolled endpoints. Microsoft could leverage its partnership with OpenAI and Azure AI Studio to provide pre-built agent templates that run entirely within a customer’s dedicated Cloud PC instance.

This architecture solves key governance challenges: data never leaves the managed boundary, activity is logged for compliance, and the agent’s resource consumption is capped. For IT admins, this means learning a new set of management tools, understanding licensing implications for persistent Cloud PCs, and integrating Windows 365 security baselines with existing Defender and Sentinel policies. The convergence of virtual desktops and AI orchestration could represent a significant new workload for Azure, and Windows 365 appears to be the delivery vehicle.

Other Enterprise IT Updates: Intune, Baselines, and Lifecycle

The June recap undoubtedly includes a raft of smaller but impactful changes. Intune continues to mature, with new reporting dashboards, driver and firmware management capabilities, and policy templates for Windows 11 multi-app kiosk mode and Microsoft Edge update controls. Security baselines are being refreshed to align with 26H2 and the upcoming security deprecations, giving admins a ready-made configuration pack to deploy via Group Policy or Intune.

Lifecycle deadlines also loom. Windows 11 23H2 Enterprise and Education editions will likely reach end of service in the coming months, forcing upgrades to 24H2 or later. The recap may have reminded organizations that automated servicing via Windows Update for Business deployment rings is the most reliable way to maintain compliance without overwhelming helpdesks. Copilot for Windows, increasingly woven into the search and productivity experience, will receive enhancements that could also impact data privacy settings—admins will want to review those policies before enabling for the broader user base.

What IT Must Do Now

The June recap is not just a status update; it is a call to action. With a new feature update on the horizon, a critical security cipher heading for retirement, and print infrastructure under modernization mandates, the second half of 2026 will be a busy period. Organizations that act early can turn these changes from potential disruptions into competitive advantages. Those that delay risk weekend firefights and user dissatisfaction.

Immediate priorities include:

  • Launch Insider testing for 26H2: Deploy Dev or Canary builds on a handful of representative hardware configurations to surface incompatibilities.
  • Audit Kerberos RC4 reliance: Use native tools or third-party utilities to enumerate accounts and applications still using RC4; migrate to AES and update scripts.
  • Plan the print transition: Inventory printers, test protected print mode on pilot groups, and configure Universal Print where feasible.
  • Explore Windows 365 AI and dev scenarios: Start a trial to understand the manageability and cost model for Cloud PCs dedicated to development or agent workloads.
  • Review security baselines and compliance policies: Apply updated baselines and leverage Intune to enforce modern authentication and printing configurations.

The Windows platform is evolving rapidly, and the June 2026 recap makes clear that standing still is not an option. The tools are there for those willing to act.