Companies that use Microsoft Teams

We dug into our own data to find which companies are using Microsoft Teams in production. We also asked engineers responsible for communications/voice/phone infrastructure working in these companies to tell us how they're using it (ie. which use cases). Here are real-world examples of how the biggest companies in the world are using Microsoft Teams.

Visa

Financial Services · Foster City, CA · Microsoft Teams

Visa is the payment network behind most of the card transactions that happen every day, worldwide.

Running a company that size means a lot of employees who need to stay connected, and Visa uses Microsoft Teams as the platform for all of it. There's a dedicated engineering team in Bengaluru whose entire focus is Teams, owning the strategy, architecture, governance, and day-to-day operations globally.

The scope of what they manage is wide. Meetings, chat, and voice are the basics. But they also handle the physical side: conference room hardware, desk phones, and space booking systems. On the telephony front, Teams Phone has replaced traditional phone infrastructure, with engineers managing call routing, how physical phones get provisioned, and compliance requirements around call recording and retention.

Teams connects into the rest of Visa's Microsoft 365 stack too. SharePoint Online, Exchange Online, and OneDrive all feed into it, and keeping those integrations running smoothly is part of what the Bengaluru team owns.

The more interesting part of their investment is in automation. Visa is building on top of Microsoft's Graph API, which is essentially a way to write code that reads and acts on data from across Microsoft 365. They're using it to automate workflows, surface insights from meetings, and build intelligent agents that run inside Teams. The direction is clear: use the platform's own data to make collaboration smarter, not just keep the lights on.

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BMO

Financial Services · Toronto, Canada · Microsoft Teams

BMO is one of Canada's largest banks, serving personal and business customers across North America.

Like most banks its size, BMO has thousands of employees spread across offices, branches, and remote locations. Microsoft Teams is how they keep that workforce connected, and they've built a dedicated engineering practice around it called Unified Communications Engineering.

What makes BMO's story specific is the telephony side. They're in the process of consolidating legacy phone systems onto Teams Phone, which means replacing traditional office phone infrastructure with calling that runs through the Teams app instead. That involves configuring how calls get routed, managing physical desk phones, and handling the hardware that connects their internal phone network to the regular public phone system.

Teams at BMO also ties into SharePoint Online, OneDrive, and Power Platform, and the engineering team owns those integrations alongside the core calling and collaboration setup.

The broader mandate is to reduce the complexity and cost that comes from running multiple old communications platforms in parallel. Teams is the consolidation point, and the engineering team's job is to get everything onto it and keep it running cleanly.

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Wells Fargo

Financial Services · San Francisco, CA · Microsoft Teams

Wells Fargo is one of the largest banks in the United States, serving tens of millions of customers across retail banking, commercial banking, and financial services.

Microsoft Teams is the collaboration platform for the whole company, but what's interesting about Wells Fargo's setup is that they don't just run Teams — they build on top of it. Their engineering practice uses Microsoft's Graph API and the Teams SDK to develop custom applications that live inside Teams: bots that automate workflows, messaging extensions that surface information in context, and adaptive cards that let employees take actions without leaving the app.

Teams also connects to a wide range of other systems at Wells Fargo. The engineering team integrates it with Power Platform, Azure Functions, and third-party applications, making Teams the interface through which a lot of internal tooling gets surfaced to employees. That includes service management workflows built on ServiceNow.

The compliance dimension is specific to a bank. Wells Fargo operates in a heavily regulated environment, which means every Teams integration has to be documented for audit readiness, every configuration has to meet security and governance policies, and the team has to stay ahead of Microsoft's product roadmap to assess how upcoming changes might affect how the bank runs.

The most forward-looking part of their investment is in AI. Wells Fargo is actively incorporating Microsoft Copilot and other AI tooling into their Teams environment, with engineers expected to understand how large language models fit into the collaboration stack.

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MUFG

Financial Services · Tokyo, Japan · Microsoft Teams

MUFG is one of the world's largest financial groups, with operations spanning commercial banking, investment banking, asset management, and consumer finance across more than 40 countries.

Running a global financial institution means managing an equally global communications infrastructure, and MUFG has built Teams Phone as the backbone of their enterprise voice system. This goes well beyond just making calls through Teams. Their engineering practice handles the full telephony stack: Direct Routing, which connects Teams to the public phone network through their own infrastructure; SBC configuration, which is the hardware that sits between Teams and the telephone network; number porting across countries; and emergency call compliance under FCC E911 regulations.

The regulatory dimension is significant. Financial institutions face strict requirements around how calls are handled, recorded, and monitored. MUFG's setup includes call recording integrations with enterprise-grade systems, and the engineering team is responsible for managing compliance with financial industry and telecommunications regulations simultaneously.

To keep tabs on all of it, they run IR Prognosis alongside Teams, a monitoring platform purpose-built for real-time communications infrastructure. It gives their engineering team visibility into call quality, system health, and performance analytics across their multi-vendor voice environment globally.

For a bank operating at this scale, voice infrastructure is mission-critical, and MUFG has invested accordingly in the engineering practice to keep it running.

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Ramsay Health Care UK

Healthcare · England, UK · Microsoft Teams

Ramsay Health Care UK is one of the largest independent hospital groups in England, operating more than 30 acute hospitals and treatment centres across the country.

Running a hospital network means running a phone system that actually works. Ramsay has moved their entire telephony infrastructure onto Teams Phone, replacing traditional phone systems across more than 30 sites with calling that runs through the Teams app.

That covers the full stack: Direct Routing, which connects Teams to the public phone network through Ramsay's own infrastructure; call queues that manage how incoming calls are routed across departments; auto attendants that handle calls when staff are unavailable; and IVR systems, which are the menus callers navigate when they ring in.

In a clinical environment, call handling carries real weight. Calls need to reach the right person reliably, at any hour, and the system has to stay up. Ramsay manages compliance with both internal business continuity policies and external regulatory requirements, and the engineering practice is responsible for keeping the telephony infrastructure patched, updated, and secure.

Teams at Ramsay also connects to the broader Microsoft 365 stack, with SharePoint Online, Viva, and Power Platform all part of the picture alongside the core calling infrastructure.

For a hospital group, replacing the phone system is genuinely high-stakes work. Ramsay has committed to doing it at scale, across dozens of sites, on a single platform.

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ROCKWOOL Group

Manufacturing · Hedehusene, Denmark · Microsoft Teams

ROCKWOOL Group is a Danish manufacturer best known for stone wool insulation, with operations across 40 countries and around 12,000 employees worldwide.

Coordinating that kind of global footprint requires a collaboration platform that can be managed consistently across regions, languages, and business units. ROCKWOOL runs Microsoft Teams and SharePoint Online as their core collaboration stack, with a dedicated engineering practice responsible for keeping both platforms running and evolving.

The scope goes beyond basic administration. The engineering practice handles data migrations into SharePoint and Teams, governs how content is structured and retained across the organization, and manages integrations with Power Platform for automation. There's also a Power BI layer on top, used to surface reporting and analytics across the business.

What's notable is how ROCKWOOL treats this as a product rather than a utility. The engineering practice maintains technical roadmaps for the platforms, runs training and adoption programs for employees, and owns continuous improvement across the collaboration environment. That's a level of investment you'd expect from a software company, not a building materials manufacturer.

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GE HealthCare

Healthcare · Chicago, IL · Microsoft Teams

GE HealthCare is one of the world's largest medical technology companies, making devices and software used in hospitals and clinics across more than 160 countries.

Microsoft Teams is the collaboration platform for the whole company, and GE HealthCare has built a dedicated practice around running it. Based in Bengaluru, the practice is responsible for the full lifecycle: user support and escalations, Teams Voice, Teams Rooms hardware, governance, and ongoing platform improvement.

What's notable is how seriously they've invested in the support infrastructure around it. The practice maintains a tiered support structure from level one through to executive support, runs a call quality dashboard to monitor voice performance, and builds and maintains knowledge base articles that help employees use the platform more effectively. They also develop micro-learning content and tips and tricks to drive adoption across the business.

On top of the day-to-day operations, the practice owns intake processes for things like creating new Teams environments, managing application integrations, and handling federation requests, which control which external organizations employees can communicate with through Teams.

There's also an internal community element. GE HealthCare is building a peer-to-peer Teams community, a forum where employees can share information, surface tips, and learn from each other rather than routing everything through the support function.

For a company whose core business is medical technology, that level of investment in how Teams is run and adopted across the organization is telling.

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Truist

Financial Services · Charlotte, NC · Microsoft Teams

Truist is one of the largest commercial banks in the United States, formed from the merger of BB&T and SunTrust in 2019.

Microsoft Teams is their primary collaboration platform, and Truist has invested in building real engineering depth around it. Their practice configures and manages Teams across the full Microsoft 365 stack, integrating it with SharePoint Online, Exchange Online, and compliance tooling inside Microsoft Purview, Microsoft's platform for data governance, compliance, and information protection.

The engineering work goes beyond standard administration. Their engineers build custom Teams solutions to meet specific business requirements, write PowerShell scripts to automate platform management, and set data retention and protection policies to meet the compliance standards expected of a large regulated bank.

There's also a governance layer. The practice manages content within Teams including topics, acronyms, and learning resources, and controls which tools inside the platform get rolled out to employees based on business need. That kind of deliberate, managed approach to the platform reflects how seriously Truist treats Teams as a long-term infrastructure investment.

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ICE

Financial Services · Atlanta, GA · Microsoft Teams

ICE (Intercontinental Exchange) operates some of the world's most important financial markets, including the New York Stock Exchange. Their infrastructure underpins trading, clearing, and data services across global markets.

Running that kind of business means running communications infrastructure that has to be exceptionally reliable. ICE uses Microsoft Teams as their company-wide collaboration platform, with a dedicated engineering practice responsible for the full environment: chat, meetings, conferencing, video, voice, and conference room hardware.

The scope includes Teams Phone, which handles enterprise voice across the organization, as well as integration with SharePoint, OneDrive, and Power Platform. The engineering practice also manages network connectivity and bandwidth specifically for Teams, which matters in an environment where call quality and reliability are non-negotiable.

There's a deliberate operational discipline to how they run it. The engineering practice evaluates and tests new Teams features before rollout, manages hybrid and multi-geography deployments, and maintains documentation of configurations and processes. For a company whose business depends on markets staying open and communications staying up, that kind of rigor makes sense.

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AIA

Insurance · Hong Kong · Microsoft Teams

AIA is one of the largest life insurance groups in Asia-Pacific, operating across 18 markets including China, Hong Kong, Thailand, Singapore, Malaysia, Australia, and India.

Running a regulated financial services business across that many countries means managing communications infrastructure that has to work reliably in every one of them. AIA has built a dedicated Teams Voice engineering practice based in Kuala Lumpur, responsible for enterprise telephony across the entire group.

The scope is substantial. The practice handles Direct Routing and Operator Connect, the two main methods for connecting Teams Phone to public telephone networks. It also manages migrations from legacy PBX systems, which are traditional on-premises phone exchanges, onto Teams. That migration work is complex in a multinational environment because each market has its own carriers, number formats, and regulatory requirements around things like call recording and data retention.

The compliance dimension is particularly significant in insurance. Call recording policies, data retention standards, and regulatory requirements vary market by market across Asia-Pacific, and the engineering practice is responsible for configuring Teams to meet those requirements in each one.

On top of the voice infrastructure, the practice coordinates with service desk and support teams across the globe for incident resolution, and maintains detailed documentation of the entire Teams telephony environment.

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Alstom

Transportation Manufacturing · Saint-Ouen, France · Microsoft Teams

Alstom is a French transportation company that designs and manufactures trains, signalling systems, and rail infrastructure. Their products move more than 100 million people daily across rail networks around the world.

Supporting a workforce of 75,000 people spread across global operations requires a collaboration platform that can be managed at scale. Alstom runs Microsoft Teams for all of them, with a dedicated L2 and L3 engineering practice in Bengaluru responsible for the platform.

The voice and telephony side is particularly deep. The engineering practice manages Teams Voice and PSTN conferencing, configures and maintains SBC and SIP infrastructure, handles voice gateway management, and troubleshoots call quality issues using log analysis and network diagnostic tools. They support IP telephony for desk phones as well as softphones.

The practice also runs within a strict ITIL service management framework, meaning incidents, problems, changes, and releases all follow formal processes. That level of operational discipline reflects the scale of what they're running: Teams for 80,000 users globally, with voice and conferencing infrastructure that has to stay up across multiple continents.

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Honeywell

Industrial Technology · Charlotte, NC · Microsoft Teams

Honeywell is an American industrial technology company making products and software for aerospace, building automation, industrial safety, and energy. With around 100,000 employees globally, keeping everyone connected is an engineering problem in its own right.

Honeywell runs Microsoft Teams as their enterprise collaboration platform, with a dedicated engineering practice based in Brno, Czech Republic, responsible for the full unified communications stack. That includes Teams Phone, Direct Routing, SBC configuration, and migrations from Skype for Business onto Teams.

The engineering scope goes deeper than standard administration. The practice manages data governance labels within Microsoft 365, which control how sensitive information is classified, retained, and protected across the organization. They also handle Azure AD conditional access policies, which determine when and how employees can authenticate into company systems. Both are meaningful in an industrial company operating across regulated sectors like aerospace and defence.

The practice operates within a formal ITIL service management framework, covering incident management, problem management, and change management. That kind of structure is typical for a company where system reliability is non-negotiable.

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Groupe SNCF

Rail Transportation · Saint-Denis, France · Microsoft Teams

SNCF is France's national railway company, operating the country's train network and one of Europe's largest transportation groups.

Running a workforce spread across train operations, infrastructure, stations, and digital services means managing collaboration tools at significant scale. SNCF has a dedicated three-person unified communications engineering team responsible for Microsoft Teams across the entire group.

The scope covers the full Microsoft 365 collaboration stack alongside Teams: SharePoint, OneDrive, Power BI, Stream, and more. The engineering practice maintains a catalogue of certified Teams hardware devices, manages the service lifecycle from deployment through to ongoing administration, and handles level 3 support for incidents escalated from the SNCF support structure.

There's also an automation layer. The practice works on automating routine service requests and maintenance activities, reducing the manual overhead of running Teams at this scale. That includes working with PowerShell, Entra ID, and the broader Microsoft 365 toolset.

For a company whose core business is moving trains, the investment in a dedicated engineering practice around Teams reflects how central the platform has become to how SNCF's 60,000-person workforce communicates and collaborates.

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Solventum

Medical Technology · Maplewood, MN · Microsoft Teams

Solventum is a medical technology company spun off from 3M in 2024, focused on healthcare products and software used in clinical settings worldwide.

Microsoft Teams is their primary collaboration platform, with a dedicated administrator responsible for the full environment: deployment, configuration, governance, compliance, Teams Rooms hardware, and Teams calling.

The compliance dimension is specific to healthcare. Solventum operates under HIPAA, the US federal law governing how patient health information is handled, and the engineering practice is responsible for ensuring Teams configurations meet those standards. That means managing data retention policies, access controls, and security settings with healthcare regulatory requirements in mind.

The practice also covers Teams Rooms hardware across the organization, manages SharePoint alongside Teams, and uses PowerShell for automation of routine administrative tasks. With Teams calling included in scope, it's a full unified communications environment rather than just a messaging and meeting platform.

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AAM

Automotive Manufacturing · Detroit, MI · Microsoft Teams

AAM (American Axle & Manufacturing) is a Detroit-based automotive supplier making driveline components and metal forming products for electric, hybrid, and internal combustion vehicles. They operate more than 80 facilities across 18 countries.

Teams Voice is the enterprise telephony backbone across all of them. AAM's engineering practice manages Teams Phone globally, handling SBC and SIP trunk configuration, voice routing, dial plans, call queues, auto attendants, and E911 compliance across their international footprint.

The migration dimension is significant. The practice is responsible for moving users off legacy Skype for Business and older phone systems onto Teams, which in a manufacturing environment means handling not just desk phones and softphones but also analog devices like paging equipment, elevator phones, and night bells that have to be integrated or replaced.

They also support Teams Rooms and conference room hardware, integrate with Cisco Telepresence systems, and maintain ITIL-based operational procedures for incident, problem, and change management.

For a manufacturer running operations across 18 countries, having a single telephony platform that covers everything from executive softphones to factory floor paging systems is a meaningful operational commitment.

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