SMB Compatibility Checker for Legacy Shares

Problem Context

Small businesses with legacy SANs (like old Dell Celerra units) rely on mapped drives for shared files. After upgrading Domain Controllers to newer Windows Server versions (e.g., 2025), these SMB shares stop working because the legacy SAN no longer supports the updated SMB protocols. IT admins are left troubleshooting compatibility issues manually, often without success.

Pain Points

Admins waste hours enabling old protocols (like SMBv1), checking DNS/LDAP/NTP, and allowing all Kerberos encryption—only to find the share still doesn’t work. Users who haven’t rebooted can still access files, but others are locked out, creating inconsistency. The problem isn’t documented in official Microsoft guides, leaving admins with no clear fix.

Impact

Downtime means employees can’t edit or save files, leading to lost work, missed deadlines, and frustrated teams. The business risks data silos if files can’t be shared, and admins may resort to costly consultants or risky workarounds (like keeping SMBv1 enabled for security risks). The longer the issue persists, the higher the risk of permanent data loss or corruption.

Urgency

This is a critical issue because it halts daily operations until resolved. Unlike other IT problems, SMB share failures directly block access to essential files, making them a top priority for IT teams. Admins can’t ignore it—users will keep reporting the problem, and the business will keep losing productivity until it’s fixed.

Target Audience

IT administrators in small-to-mid-sized businesses (10–500 employees) managing legacy storage (SANs, NAS) alongside modern Windows Server environments. This includes MSPs (Managed Service Providers) supporting multiple SMB clients with similar setups, as well as internal IT teams in industries like healthcare, education, and manufacturing where legacy systems are common.

Solution Approach

A cloud-based tool that scans Domain Controllers and legacy SANs to identify SMB protocol compatibility issues before or after upgrades. It provides a clear report of which protocols are supported on both sides, highlights mismatches, and suggests fixes—like enabling specific SMB versions or configuring Kerberos settings—without requiring manual guesswork.

Key Features

1. and encryption requirements (AES-128, AES-
2. .
3. Step-by-Step Fix Guide: If mismatches are found, the tool generates a custom checklist (e.g., ‘Enable SMBv2 on the SAN’ or ‘Adjust Kerberos settings on the DC’).
4. Pre-Upgrade Check: Admins can run scans before DC upgrades to avoid downtime.
5. Monitoring Mode: Continuously tracks SMB health and alerts admins to potential issues before they cause outages.

User Experience

An IT admin logs into the web app, enters their DC and SAN IPs, and clicks ‘Scan.’ Within minutes, they receive a report like ‘Your DC supports SMBv3 with AES-256, but your SAN only supports SMBv2 with RC4.’ The tool then provides a link to Microsoft’s docs for the fix or a one-click guide. Admins apply the changes, rescan, and confirm the share is accessible—all without needing to call support or reboot systems.

Differentiation

Unlike free tools (like DCDIAG) or Microsoft’s generic guides, this tool focuses *specifically- on SMB compatibility between DCs and legacy SANs. It doesn’t just say ‘enable SMBv1’—it explains *why- that might not work and offers alternative fixes. The web-based interface requires no installation, and the monitoring feature proactively prevents future issues, unlike one-time diagnostic tools.

Scalability

The tool starts with basic SMB compatibility checks but can expand to monitor other legacy protocols (NFS, FTP) or integrate with ticketing systems (like ServiceNow) for automated remediation. For larger businesses, it can scale to scan multiple DCs and SANs, and pricing can shift from per-seat to per-organization as needs grow.

Expected Impact

Businesses avoid downtime and lost productivity, saving hundreds of dollars per incident. Admins spend minutes diagnosing issues instead of hours, and users regain immediate access to their files. The tool also reduces the risk of security vulnerabilities (e.g., forcing SMBv1. by recommending secure alternatives. Over time, it builds trust with IT teams as a reliable ‘insurance policy’ against upgrade-related failures.