If your enterprise runs on Mitel MiVoice Connect, you're in a difficult position. Mitel filed for Chapter 11 bankruptcy in March 2025. MiVoice Connect reached end of sale in December 2025. MiCloud Connect reached end of life in June 2026. And Mitel's strategic direction has shifted away from the platform you're running.

Your support window is closing. Your vendor is restructuring. And the engineers who know your system are leaving for companies that aren't in bankruptcy.

This guide explains what happened, what it means for your enterprise, and your migration options — with a clear recommendation for which path makes sense.

What Happened to Mitel

March 2025 — Chapter 11 bankruptcy. Mitel filed for Chapter 11 to restructure its debt. The filing was part of a pre-packaged restructuring plan, but it sent a clear signal: Mitel's financial trajectory was unsustainable, and the company was narrowing its focus.

December 2025 — MiVoice Connect end of sale. No new systems sold. Existing customers can continue operating, but no new features, no expansion, and a finite support window.

June 2026 — MiCloud Connect end of life. The cloud variant of MiVoice Connect reached end of life. Customers must migrate to another platform.

Strategic realignment with Zoom. Mitel has partnered with Zoom, positioning Zoom Phone as the preferred migration path for MiVoice Connect customers. This is Mitel's recommended path — but it's not the only path, and it may not be the best one for your enterprise.

What This Means for Your Enterprise

If you're running MiVoice Connect, here's the risk landscape:

No security patches. End of sale means no new code. Security vulnerabilities discovered after the end of sale date won't be patched. Your voice infrastructure becomes increasingly exposed over time.

No vendor support. Mitel's support organization is contracting. Response times are getting longer. Expert engineers are leaving. The institutional knowledge that supports your system is eroding.

Compliance risk. If your E911 configuration depends on Mitel infrastructure, compliance maintenance becomes harder as support disappears. Kari's Law and RAY BAUM's Act don't care that your vendor went bankrupt.

Talent drain. Telecom engineers who specialize in Mitel are reading the same news you are. They're updating their resumes. The people who know your system are the people most likely to leave first.

Pricing leverage. If you wait until the final support deadline, you're migrating under pressure — and you'll pay premium rates for emergency migration services. Start now, and you negotiate from a position of strength.

Your Migration Options

You have three realistic migration paths:

1. Zoom Phone (Mitel's preferred path). Mitel recommends Zoom Phone for MiVoice Connect customers. Zoom Phone is a solid cloud phone system with good UC capabilities. But it has limitations for enterprises with complex infrastructure:

Zoom Phone is a good choice if you're already a Zoom customer, you have no analog devices, and you want a quick migration. But if you're already on Microsoft 365 — and most enterprises are — Teams is the more natural consolidation.

2. Microsoft Teams with Calling Plans. If you're already on Microsoft 365, extending Teams to handle voice is the obvious consolidation. But Calling Plans have the same limitations as Zoom Phone for complex enterprises:

Calling Plans work for small, simple deployments. For enterprises with 1,000+ users, analog devices, or compliance requirements, they're expensive and limited.

3. Microsoft Teams with Direct Routing. This is the strongest path for most Mitel enterprises. Direct Routing gives you:

Why Direct Routing Is the Strongest Path for Mitel Enterprises

Three reasons:

1. Your analog devices survive. If you're running MiVoice Connect, you likely have analog devices — elevator phones, warehouse paging, fax machines, door intercoms. Zoom Phone and Teams Calling Plans can't integrate them. Direct Routing can, through ATAs connected to your SBC. This is often the single deciding factor.

2. You're probably already on Microsoft 365. Most Mitel enterprises have Microsoft 365 for email, collaboration, and file sharing. Teams is already on every desktop. Adding voice to Teams is consolidation — not adding a new platform. Zoom Phone means adding Zoom to your stack (or deepening your Zoom investment if you already have it).

3. Cost. Direct Routing's shared-trunk pricing model is significantly cheaper than Zoom Phone or Calling Plans at enterprise scale. A 5,000-user enterprise can save $400,000+ annually compared to per-user pricing models. Use our ROI calculator to see your exact savings.

How to Plan Your Mitel Migration Timeline

Assess your current environment now. Don't wait for the final support deadline. Audit your MiVoice Connect configuration: users, extensions, analog lines, dial plans, voicemail, call routing, E911 setup.

Identify analog dependencies. Walk your buildings. Find every analog line. Document what's connected and why. This is the piece that blocks most migrations — and the piece we specialize in.

Plan a 4–6 month migration window. Discovery (2–3 weeks), design and lab (3–4 weeks), pilot (2–3 weeks), production cutover (1–2 weeks), hypercare (2–4 weeks). Add buffer for complexity.

Don't wait for the final EoL date. The enterprises that migrate early do so on their own timeline, with their own budget, and with negotiating leverage. The enterprises that wait migrate under pressure, at premium rates, with a deadline breathing down their necks.

Ready to Plan Your Mitel Migration?

Get your Mitel migration assessment — we'll audit your current environment, identify your analog dependencies, and map the migration path to Teams Direct Routing with a timeline and ROI model.