MiVoice Connect End of Life: Why Waiting Until 2029 Could Cost Your Business

Updated October 2026

Your Mitel or ShoreTel phone system might still be working perfectly well. Calls are coming in, employees can reach each other, and your business is running as usual.

So why should replacing it be a priority?

Because a phone system that still works isn’t necessarily a phone system that’s still supported, secure, or ready for the future.

If your organization relies on Mitel MiVoice Connect, formerly ShoreTel Connect, several important end-of-life deadlines have already passed. And while Mitel’s final technical support deadline isn’t until December 31, 2029, the limitations businesses face today are already making upgrades and expansion more difficult.

The good news? You still have time to make a thoughtful decision about what comes next.

Here’s what you need to know about the MiVoice Connect end-of-life timeline, the risks of waiting, and your options for moving forward.

Is Mitel MiVoice Connect Still Supported in 2026?

Yes, but with important limitations.

Mitel has officially placed MiVoice Connect into its product end-of-life lifecycle. While technical support is scheduled to continue through December 31, 2029, design support ended December 31, 2025.

That’s an important distinction.

Technical support may still be available for eligible systems, but that doesn’t mean Mitel is continuing to develop the platform, introduce new features, or provide the same level of software maintenance you once relied on.

For businesses using older ShoreTel systems, this means your communications infrastructure may continue operating, but its ability to adapt to new requirements is increasingly limited.

And if you’re responsible for keeping employees, customers, and critical business operations connected, that’s something worth addressing now.

Mitel MiVoice Connect End-of-Life Timeline: Key Dates

Several milestones have already passed, and each affects what businesses can reasonably expect from their existing systems.

Date	Milestone	What it means for your business
July 6, 2024	End of new system sales	New MiVoice Connect systems are no longer sold.
December 31, 2024	End of general add-on sales	Expanding your system through standard hardware and software purchases became more restricted.
December 31, 2025	End of design support	Routine product development and planned software updates ended.
December 31, 2025	End of standard extended license sales	Adding users and expanding capacity became more difficult, with some exceptions requiring Mitel approval.
December 31, 2029	End of technical support	Mitel’s remaining technical support commitment is scheduled to end.

One important clarification: End of design support is not the same as end of all technical assistance. Critical issue handling and certain support entitlements may continue during the remaining lifecycle period, depending on the system and agreement.

If your organization has a specific MiVoice Connect release, licensing arrangement, or support contract, it’s worth confirming exactly what coverage remains.

What Happens If You Keep Using MiVoice Connect?

First, your phones won’t automatically stop working when a support deadline passes.

That’s an important point, especially if you’ve invested significantly in your communications infrastructure.

But keeping an aging phone system running becomes a different proposition when the manufacturer is no longer actively developing it.

Here are four areas worth considering.

1. Security and Compliance Become Harder to Manage

As software ages, new vulnerabilities can emerge. Without ongoing routine security updates, IT teams may have fewer options for addressing those vulnerabilities directly.

That doesn’t automatically mean your system is compromised or noncompliant. It does mean your organization needs to evaluate its exposure, compensating security controls, and any industry-specific requirements.

For healthcare organizations, financial institutions, government agencies, and businesses handling sensitive customer information, these questions deserve particular attention.

2. Finding Replacement Hardware Can Become a Challenge

Hardware doesn’t last forever.

Phones fail. Components wear out. Servers need replacing. And when manufacturers discontinue product lines, replacement parts and compatible equipment can become more difficult to source.

A minor hardware failure that once required a straightforward replacement could eventually become a much more complicated problem.

If your organization has multiple offices, campuses, or facilities, those challenges can multiply quickly.

3. Your Business May Outgrow the System

Maybe you’re adding employees, opening another location, expanding customer service operations, or introducing new ways for teams to collaborate.

Those are good problems to have.

But an end-of-life communications platform can limit your ability to respond.

With licensing and expansion restrictions already in place, accommodating growth may require additional planning, alternative configurations, or ultimately a different communications platform.

4. An Unplanned Migration Is Usually the Hardest Kind

There’s a big difference between replacing a phone system on your schedule and replacing one because something has failed.

A planned migration gives you time to evaluate solutions, confirm integrations, review costs, train employees, and coordinate the transition.

An emergency replacement can leave you making important decisions under pressure, with less flexibility and a much greater risk of disruption.

The real question isn’t whether your MiVoice Connect system can make it to 2029. It’s whether waiting that long makes sense for your business.

What Are Your Best Mitel MiVoice Connect Replacement Options?

The good news is that moving away from MiVoice Connect doesn’t mean starting from scratch.

Today’s business communications platforms offer more deployment flexibility, integration capabilities, and collaboration tools than were available when many ShoreTel systems were first installed.

And there’s no single right answer for every organization.

Option 1: Upgrade to Mitel MiVoice Business

If you’re comfortable with Mitel and your organization has requirements that favor an on-premises or hybrid deployment, MiVoice Business may be a logical next step.

Mitel identifies MiVoice Business as an upgrade path for MiVoice Connect customers.

Depending on your environment, it may allow you to maintain a familiar communications ecosystem while moving to a platform with an ongoing product roadmap.

This option may be especially worth evaluating if your organization has specialized voice requirements, complex integrations, or operational reasons for maintaining more control over its communications infrastructure.

Option 2: Move to a Cloud-Based Phone System (UCaaS)

For many organizations, the end of MiVoice Connect is an opportunity to rethink how employees communicate.

Unified Communications as a Service, or UCaaS, brings business calling, messaging, meetings, and collaboration tools together on a cloud-based platform.

Solutions such as RingCentral, Zoom Phone, 8×8, and other business communications platforms may offer advantages including:

• Employees can make and receive business calls from a computer, mobile device, or supported desk phone.
• Teams can communicate across offices and remote locations more easily.
• Cloud-based administration can reduce the burden of maintaining on-premises phone infrastructure.
• Modern integrations can connect communications with CRM, customer service, and productivity tools.
• Organizations can access features such as intelligent call routing, analytics, transcription, and AI-powered assistance, depending on the platform and subscription.

For companies supporting hybrid workforces or multiple locations, these capabilities can make a meaningful difference in everyday productivity.

Of course, cloud communications aren’t automatically the best fit for everyone. Network readiness, reliability requirements, recurring costs, and existing integrations all need to be considered. Global CTI works with multiple leading UCaaS providers, which enables us to recommend the best solution for your business needs. We offer a complimentary MiVoice Connect Migration Readiness Assessment to help you explore options.

Option 3: Consider a Hybrid Communications Solution

Not every organization wants, or needs, to move everything into the cloud.

Schools, healthcare facilities, government agencies, manufacturers, and other organizations may have specialized requirements involving emergency communications, paging, analog devices, or critical operational systems.

A hybrid approach can provide a practical path forward, combining on-premises communications capabilities with cloud-based collaboration and calling services.

It can also allow organizations to modernize in phases rather than replacing everything at once.

The important thing is finding an approach that supports how your organization actually operates, not forcing your business into a technology model that doesn’t fit.

Can You Keep Your Existing Mitel or ShoreTel Phones?

Possibly, and it’s absolutely worth checking before you budget for a complete hardware replacement.

Certain Mitel phone models can be compatible with alternative platforms or supported through specific migration programs. Other models may require replacement, configuration changes, or additional licensing.

Compatibility depends on the exact model, firmware, selected provider, and deployment requirements.

It’s also worth asking how many employees still need a physical desk phone.

For some teams, a desktop calling application or mobile app may provide everything they need, eliminating the need to replace every handset.

A good migration plan starts by identifying what you can keep, what needs to change, and where new technology will genuinely add value.

How to Plan Your MiVoice Connect Migration Without Disrupting Business

Replacing a business phone system doesn’t have to be overwhelming.

The key is to start with a clear understanding of your current environment and what your organization needs from its next communications platform.

Step 1: Assess Your Existing System

Document your current phones, licenses, users, locations, call flows, integrations, and support arrangements.

Don’t forget the less obvious dependencies, including paging systems, contact centers, emergency calling, fax services, and other connected equipment.

Step 2: Identify What’s Working and What Isn’t

Talk with employees and department leaders.

Are people struggling with remote access? Do customer calls get routed efficiently? Are IT teams spending too much time maintaining the system?

Your next platform should solve real business problems, not simply replace old technology with something newer.

Step 3: Compare Your Options

Evaluate on-premises, hybrid, and cloud solutions against your actual requirements.

Consider reliability, cybersecurity, features, support, scalability, and the total cost of ownership.

And don’t feel obligated to stay with one manufacturer simply because that’s what you’ve always used.

Step 4: Test Before You Commit

A proof of concept can help you understand how a proposed solution performs in your environment.

Test important calling features, integrations, device compatibility, and the experience for employees who will use the system every day.

Step 5: Plan a Phased Transition

For larger organizations, a phased migration can reduce disruption and make the change easier to manage.

Your plan should account for number porting, network readiness, user training, emergency calling requirements, cutover testing, and ongoing support.

The goal is to keep your business connected throughout the process.

Why 2026 Is the Right Time to Start Planning

December 2029 may still sound a long way off.

But if your organization is developing its 2027 IT budget or reviewing its long-term technology roadmap, now is an ideal opportunity to include your communications infrastructure in that conversation.

You don’t necessarily need to replace your entire system tomorrow.

You do need to understand your exposure, what your existing support agreements cover, and how long a successful migration would take.

Starting now gives you the flexibility to make decisions based on your business priorities rather than a looming deadline or unexpected failure.

And that can make all the difference.

Your Next Phone System Should Do More Than Replace the Old One

For many organizations, ShoreTel and MiVoice Connect have delivered years of reliable service. There’s no reason to overlook that investment.

But business communications have changed considerably, and the next platform you choose should support where your organization is going, not just where it’s been.

At Global CTI, we’ve supported ShoreTel and Mitel customers for years, and we understand how much planning can go into changing a business-critical communications system.

As a Mitel-certified Gold Partner with experience across multiple communications technologies, we can help you assess your current environment, compare available options, and develop a migration strategy that makes sense for your organization.

Whether that means upgrading to MiVoice Business, moving to cloud communications, or developing a hybrid solution, we’ll help you make an informed decision.

Not sure where to start?

Let’s take a look at your current Mitel or ShoreTel system, identify the risks and opportunities, and talk through your options.

Schedule a MiVoice Connect Migration Consultation with Global CTI.

No need to have all the answers. That’s what we’re here to help with.

Frequently Asked Questions About MiVoice Connect End of Life

When does Mitel MiVoice Connect reach end of life?

Mitel has scheduled the end of technical support for MiVoice Connect on December 31, 2029. However, new system sales ended in 2024, and design support ended December 31, 2025. Businesses should plan around the restrictions already in effect, not just the final support date.

Is ShoreTel still supported?

ShoreTel Connect Onsite was renamed MiVoice Connect. The platform has entered its end-of-life lifecycle, with technical support scheduled to end December 31, 2029. Support availability depends on the specific product, system configuration, and service agreement.

Will my Mitel phone system stop working in 2029?

Not necessarily. End of technical support doesn’t automatically disable a working phone system. However, continuing to operate without manufacturer technical support can increase maintenance, security, and operational risks.

What is the best replacement for Mitel MiVoice Connect?

The best replacement depends on your business requirements. Mitel MiVoice Business may be appropriate for organizations wanting to stay with Mitel, while cloud-based solutions such as RingCentral, Zoom Phone, Microsoft Teams, and 8×8 may offer greater mobility and collaboration capabilities. Hybrid solutions are also worth considering.

Can I migrate from ShoreTel to a cloud phone system?

Yes. Many organizations can migrate from ShoreTel or MiVoice Connect to cloud-based communications. A successful migration should include an assessment of network readiness, phone compatibility, existing integrations, emergency calling, and number porting.

Can I reuse my Mitel desk phones with another provider?

Some models may be reusable, depending on compatibility with the new communications platform. A technical assessment is the best way to determine which devices can be retained and which need replacement. Some cloud-based providers offer “soft phones”, direct-dial lines that are answered through a computer or mobile device with no physical phone necessary.

How long does a MiVoice Connect migration take?

Migration timelines vary depending on the number of users and locations, system complexity, integrations, carrier requirements, and whether the transition is phased. Starting early gives your organization more flexibility to plan, test, and train employees before cutover.