What Is the Microsoft Teams Service Level Agreement? The 99.9% Uptime Promise Explained

When a South African business asks “what happens if Teams goes down?” — your answer as a reseller will shape whether you close the deal or lose it to a competitor who can speak confidently to uptime. Microsoft publishes a formal Service Level Agreement (SLA) for Microsoft Teams that commits to 99.9% uptime. Here is exactly what that means, what it does not cover, and how to position it in a sales conversation.

The 99.9% Uptime Commitment

Microsoft’s SLA for Microsoft Teams — part of the broader Microsoft Online Services SLA — guarantees 99.9% monthly uptime. That translates to a maximum of approximately 8.7 hours of downtime per year, or about 43 minutes per month.

This applies to:
– Microsoft Teams calling (Voice over IP and PSTN calling via Direct Routing or Calling Plans)
– Teams meetings and conferencing
– Teams chat and collaboration features
– Teams Phone features

The SLA is backed by financial remedies — Microsoft credits customers if uptime falls below the guaranteed threshold. Credits are calculated as a percentage of monthly service fees, scaling up as downtime increases.

What the SLA Does Not Cover

This is the part many resellers skip over — and it matters for your SA customers.

The Teams SLA covers Microsoft’s infrastructure only. It does not cover:
– Local internet connectivity — If a customer’s ISP goes down, Teams goes with it. SA customers on fixed LTE or ADSL links face additional risk here.
– Direct Routing providers — If your customer is using Teams Phone via a local SIP trunk or Direct Routing provider (common in SA where Calling Plans are not natively available), that provider’s uptime is separate from the Microsoft SLA.
– Scheduled maintenance — Planned downtime is excluded.
– Force majeure events — Load shedding falls into this category for SA deployments.

Measuring Uptime: Downtime Minutes vs. Real-World Impact

Microsoft calculates downtime as minutes where the service is completely unavailable, not degraded. Slowdowns, poor call quality, or partial feature failures (e.g., meeting recordings failing while calls still work) do not count as downtime under the SLA terms.

For SA resellers, this is an important nuance when customers compare Teams to an on-premises PBX. An on-prem system with a good UPS and a PSTN failover line may deliver higher real-world availability during load shedding than a cloud service — even one with a 99.9% SLA.

How to Position the Teams SLA in a Sales Conversation

Lead with the number: 99.9% is enterprise-grade reliability. For most SA businesses, Microsoft’s infrastructure is more reliable than anything they would build on-premises.

Then address the gaps honestly: explain that the SLA covers Microsoft’s side of the connection, and that a complete Teams deployment should include a redundant internet link and — where the customer has critical calling needs — a local PSTN fallback route through a Direct Routing provider.

This positions you as a trusted adviser, not just a licence seller, and opens the door to selling connectivity and Direct Routing alongside the Teams licence.

Find Out More

For current SLA documentation, visit the Microsoft Online Services SLA page. To explore Microsoft Teams Direct Routing options available in South Africa, speak to your Microsoft distributor or visit the Microsoft Teams resources on Telecoms-Channel.

Sources:
– Microsoft Online Services SLA (Microsoft.com)
– Microsoft Teams Phone documentation (learn.microsoft.com)

About Microsoft Teams on Telecoms-Channel
For the full Microsoft Teams portfolio, company background, and South African reseller resources, visit the Microsoft Teams vendor page on Telecoms-Channel.

About the Author

Mechelle Gindra

Mechelle Gindra is the managing editor and lead content strategist at Telecoms-Channel, South Africa's dedicated intelligence platform for telecoms resellers, ICT distributors, and channel partners. She oversees the editorial team's AI-assisted content production pipeline, ensuring vendor news, market analysis, and regulatory updates are accurate, timely, and actionable for the SA telecoms channel community. With deep expertise in the South African telecoms reseller ecosystem, Mechelle directs coverage of vendor partner programmes, ICASA regulatory developments, wholesale market dynamics, and channel business strategy. She is responsible for maintaining Telecoms-Channel's editorial standards, fact-checking processes, and corrections policy.