If your organization is still running Windows Server 2016, now is the time to plan what comes next.
According to Microsoft’s product lifecycle, Windows Server 2016 extended support ends January 12, 2027. After that date, it no longer receives the regular security updates, bug fixes and technical support of the standard lifecycle. Microsoft has also announced Extended Security Updates (ESUs) as a temporary option for organizations that need more time, while recommending a move to a current Windows Server release or another supported platform.
For many small and midsize businesses, though, Windows Server 2016 end of support shouldn’t automatically mean buying another physical server. It’s a chance to ask a more important question.
Do We Still Need This Server?
Many Windows Server 2016 systems were originally installed for:
- Shared company files and mapped drives
- Active Directory
- Business applications
- QuickBooks, Sage or other accounting software
- Print services
- Backup
- Remote access
- Application databases
Some of those workloads may still need a server. Others may not. If your server’s main job today is giving employees access to shared Word documents, Excel spreadsheets, PDFs, project files and department folders, moving those files to Microsoft SharePoint and OneDrive may be a better long-term strategy than replacing it with another file server.
Why Consider SharePoint Instead of Another File Server?
Traditional file servers were built for employees working in the office and opening files from mapped drives like F:\Company Files or J:\Job Files. Today, people need information from the office, home, job sites, client locations and phones.
Access Files From Anywhere
Instead of connecting back to the office server, authorized users can securely reach SharePoint documents through Microsoft 365. For organizations with multiple offices, remote staff or field workers, that removes a major dependency on the physical office.
Better Collaboration
With SharePoint and Microsoft 365, teams can work on documents together instead of creating Proposal-Final.docx, Proposal-Final-v2.docx and Proposal-Final-REALLY-FINAL.docx. That means fewer duplicate files and clearer visibility into what’s current.
Less Physical Infrastructure
An on-premises file server comes with server hardware, Windows Server licensing, storage, backup, UPS equipment, warranties, server-room space, remote access and ongoing maintenance. Moving the right file workloads to SharePoint can reduce that burden. It doesn’t mean eliminating every server. It means checking whether each workload still belongs there.
SharePoint Is Not Simply a File Server in the Cloud
A successful SharePoint migration isn’t copying every mapped drive into one giant document library. TCI recommends reviewing four things first:
- Folder structure: years of use leave duplicate data, obsolete files and folders nested ten levels deep. Migration is the time to clean up.
- Permissions: who needs access? What’s company-wide, departmental or confidential? Are old permissions still appropriate? Those answers become a cleaner SharePoint security model.
- Data: not everything should move. Identify obsolete, duplicated and temporary files first.
- Architecture: instead of mirroring the old server, design SharePoint around how your organization works: company resources, accounting, HR, operations, projects, sales and management.
But Not Everything Belongs in SharePoint
SQL databases, line-of-business applications, some accounting and legacy ERP systems, application servers and software that requires traditional mapped-drive (SMB) access may still need Windows Server, Azure or another supported platform. That’s why the first step should be a Windows Server 2016 assessment, not just a file migration. Microsoft itself recommends inventorying server roles, applications, users, certificates, DNS, remote access, backups and integrations before migrating.
| Workload | Likely best home |
|---|---|
| Shared company and department files | SharePoint |
| Individual working files | OneDrive |
| User accounts and sign-in | Microsoft Entra ID |
| SQL databases and line-of-business apps | Windows Server 2025 or Azure |
| Legacy accounting or ERP software | Windows Server 2025 or Azure (check vendor support) |
| Software that requires traditional mapped drives | Windows Server 2025 or Azure |
| Backups | Modern cloud and/or immutable backup |
What Are Your Windows Server 2016 Options?
There isn’t one right answer for every organization:
Option 1: Upgrade to Windows Server 2025
If you still need on-premises infrastructure, supported workloads can move to Windows Server 2025, Microsoft’s current release.
Option 2: Move Workloads to Microsoft Azure
Some server workloads fit better in Azure than on new hardware, especially if you want to reduce on-site equipment or need cloud availability.
Option 3: Move File Services to SharePoint and OneDrive
Ideal when your server mainly stores and shares documents. SharePoint becomes home for shared organizational and departmental information; OneDrive is for each person’s working files.
Option 4: Use a Hybrid Approach
Often the right answer: company files in SharePoint, personal files in OneDrive, identities in Microsoft Entra ID, legacy apps on Windows Server 2025 or Azure, and modern cloud or immutable backups. The goal isn’t to be “100% cloud.” It’s putting each workload where it makes the most sense.
Option 5: Extended Security Updates
If an application can’t move before January 12, 2027, ESUs can provide critical security updates for a limited time. They’re a bridge, not a modernization strategy: no new features, and not a long-term replacement for a supported platform.
| Option | Best for | Keep in mind |
|---|---|---|
| Upgrade to Windows Server 2025 | Workloads that truly need on-premises servers | Still requires hardware, licensing, backup and maintenance |
| Move workloads to Microsoft Azure | Reducing on-site hardware while keeping server-based apps | Ongoing cloud costs; needs right-sizing and good connectivity |
| Move files to SharePoint & OneDrive | Servers used mainly for shared documents | Needs a cleanup and permissions plan, not a straight copy |
| Hybrid approach | Most small and midsize businesses | Each workload goes where it fits best |
| Extended Security Updates (ESU) | A short bridge while you finish migrating | Temporary: security fixes only, no long-term solution |
Don’t Wait Until January 2027
A server migration isn’t something to plan the week before support ends. Start by answering:
- Which Windows Server 2016 systems are still running?
- What roles does each server perform?
- Which applications depend on it?
- What data is stored there, and who has access?
- What can move to SharePoint or OneDrive?
- What still requires Windows Server?
- Should remaining workloads stay on-premises or move to Azure?
- How is the environment backed up today?
- What needs testing before the old server can be retired?
The earlier you answer these, the more options you have.
Turn End of Support Into an Opportunity to Modernize
Windows Server 2016 end of support doesn’t have to be another forced upgrade. It’s a chance to check whether decisions made five, eight or ten years ago still make sense. A business that once needed several servers may now run on Microsoft 365 + SharePoint + OneDrive + Entra ID + Azure + modern cybersecurity + cloud backup. Others will still need on-premises servers, and that’s perfectly reasonable. What matters is deciding based on today’s requirements, not replacing a server just because that’s what happened last time.
How TCI Technologies Can Help
TCI helps Long Island and NYC organizations prepare for Windows Server 2016 end of support with a practical modernization plan, including server discovery and assessment, application and workload review, file-server assessment, SharePoint migration planning, permissions design, OneDrive migration, Microsoft 365 and Entra ID planning, Windows Server 2025 and Azure migration, backup and disaster recovery, cybersecurity modernization and legacy server retirement. Already have an IT team? We can support the project through co-managed IT.
Still Running Windows Server 2016?
January 12, 2027 is approaching. Don’t wait until end of support to discover what depends on your server. Schedule a Windows Server 2016 & modernization assessment with TCI Technologies, or call us at (516) 484-5151.
Windows Server 2016 support ends January 12, 2027. Should you upgrade, move to Azure, or migrate your file shares to SharePoint? Here’s how to decide.

