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Migration

RingCentral, 8x8, or Zoom Phone to Teams Phone Migration

IT Partner migrates your business phone system from RingCentral, 8x8, Zoom Phone, or a legacy PBX to Microsoft Teams Phone for $15 per user plus a $2,500 tenant fee (estimate, confirmed in a written quote). The 3-week engagement covers discovery of your current call flows, Teams Phone licensing and PSTN connectivity selection, number porting, rebuilt dial plans, auto attendants and call queues, device and headset guidance, and a phased user cutover with coexistence — so calls keep flowing while numbers move.

Timeline 3 weeksService owner Roman SotnikMicrosoft Teams

What this engagement is

RingCentral, 8x8, and Zoom Phone are capable platforms — this migration is rarely about escaping a bad product. It is about consolidation: your team already lives in Microsoft Teams for chat and meetings, your licensing already sits in Microsoft 365, and a separate UCaaS bill plus a separate admin surface stops making sense, usually right around contract renewal. Moving calling into Teams Phone puts telephony, meetings, and chat in one client, one admin center, and one vendor relationship. The migration itself has a proven shape, and we run it the same way regardless of which provider you are leaving. First, discovery: we inventory your numbers (main lines, direct dials, and any fax or special-purpose lines), document your existing auto attendant trees, call queues, ring groups, business-hours rules, and voicemail behavior, and flag anything that does not translate one-to-one — Teams Phone does not natively replace fax lines, for instance, and we would rather tell you that in week one than after cutover. Second, foundation: we confirm Teams Phone licensing and help you choose the right PSTN connectivity — Microsoft Calling Plans, Operator Connect, or Direct Routing — then prepare the port orders with your signed letter of authorization. Third, rebuild: your dial plans, auto attendants, and call queues are reconstructed natively in Teams, matching (or improving on) the call flows your callers already know. Cutover is phased, with coexistence: your current service stays live while ports are pending, pilot users validate real calls in Teams, and numbers cut over on carrier-confirmed dates rather than in one risky big bang. Port completion dates are set by the losing carrier, not by us or Microsoft — we prepare and track every order and schedule the cutover around the confirmed dates, and we say this plainly because it is the one part of the timeline nobody can promise. Your contract with your current provider, including any notice period or early-termination terms, remains between you and them; what we do is time the migration so you are not paying for two systems longer than necessary.

Success criteria

01All in-scope users place and receive PSTN calls in Microsoft Teams from the clients and devices agreed at kickoff.
02Ported numbers are live in Microsoft 365 and assigned to the right users, auto attendants, and call queues.
03Rebuilt auto attendants and call queues route calls according to the approved call-flow document, including business hours, after-hours, and holiday behavior.
04Emergency locations are configured and assigned for in-scope numbers.
05Pilot users validated inbound, outbound, transfer, hold, and voicemail scenarios before the broad cutover.
06The legacy service is ready for decommission: no production numbers or call flows depend on it at closeout.

What you receive

Discovery report: number inventory, current call-flow documentation (auto attendants, queues and ring groups, schedules, voicemail), and a translation map into Teams Phone — including anything that does not carry over one-to-one.
Teams Phone licensing verification and PSTN connectivity recommendation (Microsoft Calling Plan, Operator Connect, or Direct Routing) for your countries and call volumes.
Port orders prepared and submitted for the in-scope numbers, with your signed letter of authorization, and tracked to carrier-confirmed completion dates.
Teams Phone configuration: licenses and numbers assigned to users and resource accounts, dial plans, and emergency locations.
Rebuilt auto attendants and call queues with greetings, menus, business-hours schedules, holiday sets, and overflow behavior — up to three auto attendants and three call queues as standard scope, matching our Teams Phone setup practice; more as additional scope.
Device and headset guidance: certified Teams device recommendations for desk phones, headsets, and common-area phones; desk phone deployment is included when the phones are purchased through IT Partner.
Phased cutover plan with coexistence: pilot group first, then user waves aligned to confirmed port dates, with fallback forwarding where the losing platform supports it.
End-user quick-start guide for calling in Teams, an admin handover session, and a closeout report confirming the legacy service can be retired.

How the work unfolds

1. Kickoff and discovery

Inventory numbers and users, document existing auto attendants, queues, ring groups, schedules, and voicemail on RingCentral, 8x8, Zoom Phone, or your PBX, and flag non-translating features (fax, SMS workflows, special integrations) early.

2. Licensing and PSTN connectivity

Verify Teams Phone licensing for in-scope users, recommend Calling Plan, Operator Connect, or Direct Routing, and confirm the countries and calling patterns the choice must serve.

3. Port preparation and submission

Collect carrier account details and the signed letter of authorization, prepare and submit port orders, and track carrier-confirmed port dates — the dates that anchor the cutover plan.

4. Teams Phone build

Assign licenses and numbers, configure dial plans and emergency locations, and rebuild auto attendants and call queues to the approved call-flow document.

5. Pilot and coexistence

Pilot users make and receive real calls in Teams while the legacy service stays live; validate transfers, queues, voicemail, and devices; tune flows against real behavior.

6. Phased cutover

Cut user waves over as ports complete, with fallback forwarding where the losing platform supports it; re-validate main-line flows the moment each number goes live in Microsoft 365.

7. Closeout and handover

Confirm nothing in production depends on the legacy service, deliver the admin handover and end-user quick-start guide, and provide the closeout report you can take to your old provider's cancellation process.

Prerequisites

A Microsoft 365 tenant with Microsoft Teams in use, and Teams Phone licensing plus a PSTN connectivity option (Calling Plan, Operator Connect, or Direct Routing) available for in-scope users — we verify this at kickoff and can supply licenses through our direct Microsoft CSP relationship; license and calling-plan costs are not part of the service fee.
Administrative access to your Microsoft 365 tenant (we request granular, time-bound GDAP access that you approve — never standing global admin) and admin access to (or exports from) your current phone platform for discovery.
Current provider account details and a signed letter of authorization for each port order.
Greetings and hold audio for the rebuilt auto attendants and call queues (or approved scripts).
A named point of contact, and pilot users available during the pilot phase.

Who does what

IT Partner

  • Run discovery and produce the number inventory, call-flow documentation, and translation map.
  • Recommend PSTN connectivity and verify Teams Phone licensing.
  • Prepare, submit, and track all in-scope port orders to completion.
  • Configure Teams Phone and rebuild auto attendants, call queues, dial plans, and emergency locations.
  • Plan and run the pilot, coexistence, and phased cutover, and deliver the handover and closeout report.

Your team

  • Provide access to the current platform (or its configuration exports) and your provider account details.
  • Sign the letter of authorization and approve the call-flow document and cutover waves.
  • Purchase (or approve our CSP order for) Teams Phone licensing and the chosen PSTN connectivity.
  • Handle the commercial relationship with your current provider, including notice periods, contract end dates, and final cancellation.
  • Make pilot users available and communicate the change to your team.

What's not included

Contact center capabilities — agent queues with analytics, IVR beyond standard auto attendants, omnichannel routing — are a separate engagement: see our Microsoft Teams Contact Center Implementation service.
Carrier and provider contract work: we do not negotiate your RingCentral, 8x8, or Zoom contract, notice periods, or early-termination terms — those stay between you and your provider; we time the migration to minimize overlap.
Microsoft license, calling plan, and usage costs, and any Operator Connect or Direct Routing carrier charges — billed by Microsoft or the carrier.
Migration of historical data from the old platform: past call recordings, voicemail messages, SMS history, and analytics exports are retrieved by you from your current provider before cancellation (we advise on what to pull).
Fax service replacement and SMS-based workflows — identified in discovery with recommended alternatives, implemented as separate scope if needed.
Desk phone deployment when the phones are not purchased through IT Partner, and any analog device (door phones, paging) gateway work beyond what is agreed in the quote.
Compliance call recording — available separately as our Automatic Call Recording for Teams implementation.
End-user classroom training — the quick-start guide and admin handover are included; structured training is our Microsoft Teams Adoption Training service.

Limitations & technical notes

!Port completion dates are controlled by the losing carrier and the underlying number owner, not by IT Partner or Microsoft. Simple ports often complete quickly once confirmed; complex or multi-carrier ports can extend beyond the typical 3-week engagement window — the cutover plan is built around carrier-confirmed dates, and coexistence keeps calling live in the meantime.
!The $15 per user + $2,500 tenant fee price is an estimate for typical scope — up to three auto attendants and three call queues rebuilt as standard — and is confirmed as a written quote after discovery; unusually complex call flows or large number inventories are quoted before work begins, never invoiced as surprises.
!Teams Phone does not natively replace every UCaaS feature: fax lines, SMS campaigns, and certain platform-specific integrations need alternatives, which discovery identifies explicitly.
!Feature behavior depends on your Microsoft licensing (Teams Phone plus Calling Plan, Operator Connect, or Direct Routing); we verify entitlements at kickoff rather than assume them.
!Your current provider's contract terms — notice periods, renewal dates, early-termination fees — are yours; the practical mitigation we offer is scheduling the migration against your renewal date so overlap is short.

Frequently asked questions

Why do companies move from RingCentral, 8x8, or Zoom Phone to Teams Phone?

Consolidation, almost always. These are capable platforms — the driver is that your team already uses Teams for meetings and chat, your identity and licensing already live in Microsoft 365, and a separate UCaaS subscription with its own admin console and bill stops earning its keep. The decision usually crystallizes at contract renewal, which is also the cheapest time to move.

What does the migration include?

Discovery of your current numbers and call flows, Teams Phone licensing and PSTN connectivity selection, number porting with tracking to carrier-confirmed dates, rebuilt dial plans, auto attendants and call queues (up to three of each as standard scope), emergency locations, device and headset guidance, a piloted and phased cutover with coexistence, an end-user quick-start guide, and an admin handover with closeout report.

How much does it cost?

$15 per user plus a $2,500 tenant fee — an estimate for typical scope, confirmed as a fixed written quote after discovery and before work begins; you pay after you approve delivery. Microsoft licensing, calling plans, and any carrier charges are billed by Microsoft or the carrier, and your remaining obligations to your current provider are separate.

Do we keep our phone numbers?

Yes — keeping your numbers is the point of porting. You provide account details from your current provider and sign a letter of authorization; we prepare and submit the port orders and track each one to completion. Main lines, direct dials, and service numbers all move; discovery catches any number that needs special handling before orders go in.

How long does porting take, and can you guarantee a date?

No one can honestly guarantee a port date — completion is controlled by the losing carrier, not by IT Partner or Microsoft. What we do is prepare clean orders (most port delays come from mismatched account details), track every order, and build the cutover schedule around carrier-confirmed dates. Simple ports often complete quickly; complex or multi-location ports can take several weeks, and coexistence keeps your calling live throughout.

Will our phones stop working during the migration?

The migration is designed so they do not: your existing service stays live while ports are pending, pilot users validate Teams calling before anyone depends on it, and users cut over in waves as their numbers complete. Where the losing platform supports it, fallback forwarding covers the transition window for main lines.

What Microsoft licensing do we need?

Teams Phone for each calling user, plus PSTN connectivity: a Microsoft Calling Plan, an Operator Connect carrier, or Direct Routing. Which one fits depends on your countries, call volumes, and any carrier relationships you want to keep — we recommend one during discovery and can supply Microsoft licenses through our direct CSP relationship. License costs are separate from the service fee.

What about our contract with our current provider?

That relationship — notice periods, renewal dates, early-termination terms, final cancellation — stays between you and them, and we do not negotiate it. What we contribute is timing: most clients schedule the migration against their renewal date, and our closeout report confirms nothing in production still depends on the old service before you cancel.

Can you rebuild our auto attendant menus and call queues exactly as they are?

We document your current trees, queues, schedules, and voicemail behavior in discovery and rebuild them natively in Teams — up to three auto attendants and three call queues as standard scope, with more available as additional scope. Migrations are also a natural moment to fix flows that callers complain about, and the call-flow document is where you approve any improvements.

What happens to our desk phones and headsets?

Teams Phone works with certified Teams IP phones, headsets, and common-area phones; some SIP phones from your current setup may be reusable via Microsoft's SIP Gateway, which discovery evaluates honestly rather than promising. We provide device recommendations in every migration; desk phone deployment is included when the phones are purchased through IT Partner, mirroring our Teams Phone setup practice.

What about faxing, SMS, and other platform features?

This is the most common surprise, so we surface it in week one: Teams Phone does not natively replace fax lines, and SMS capabilities differ from what UCaaS platforms bundle. Discovery flags every feature that does not translate one-to-one and recommends alternatives; implementing those alternatives is scoped separately, with no pressure to buy them from us.

Do you migrate old call recordings and voicemails?

No — historical recordings, voicemail messages, and analytics live in your current provider's platform, and you should export what you need before cancellation (retention obligations especially). We tell you what to pull during discovery. Go-forward compliance recording in Teams is a separate service: Automatic Call Recording for Teams.

Is end-user training included?

A quick-start guide for calling in Teams and an admin handover session are included. Structured, instructor-led training — useful when a whole company changes its phone habits at once — is our separate Microsoft Teams Adoption Training and Pilot service.

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$15 per user + $2,500 tenant fee
3 weeks
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