Microsoft-AWS Private Cloud Link Puts Carrier Circuits Under Pressure

Microsoft and AWS have turned cross-cloud networking into a jointly managed product, RCR Wireless reported, giving enterprises a private Azure-to-AWS path that can be provisioned like other cloud infrastructure instead of ordered as a bespoke carrier circuit.

The service combines AWS Interconnect - multicloud with Azure Multicloud Interconnect through a standardized OpenAPI specification.

Customers can create the link by API, console or infrastructure-as-code, while the providers manage the physical and logical connectivity that would normally involve circuit procurement, router configuration, BGP sessions and capacity planning.

The product is in public preview in four cross-cloud markets, covering two US pairings, an Australian APAC pairing and a German European pairing.

Preview users are limited to 1Gbps and one interconnect per customer in each supported region, while the companies are committing to as much as 100Gbps from day one when the service reaches general availability.

Formal service-level agreements and higher-bandwidth tiers are still pending.

The architecture uses familiar underlay pieces rather than a new global network.

Azure Multicloud Interconnect runs on Azure ExpressRoute and AWS Direct Connect, with provider-managed setup replacing customer-built colocation cross-connects.

On the AWS side, Layer 3 private networking links VPCs with other cloud environments.

Those links can attach to Transit Gateway and Cloud WAN, keeping routes and segmentation inside existing AWS operating models.

For large enterprises, the Azure pairing matters because AWS introduced its multicloud interconnect in late 2025 as a Google Cloud preview, moved it to general availability in April 2026 and then added Oracle Cloud Infrastructure.

Azure is the third cloud attached to the specification, but it is also the combination Microsoft says customers request most often.

The clearest workload driver is AI.

Training capacity may sit in AWS while proprietary data, compliance tools or a preferred AI platform remain in Azure, and a private managed link lets teams move model checkpoints, training data and inference traffic without sending that traffic over the public internet.

That private path also supports resilience and vendor-diversification plans by making a multi-cloud split an architecture choice rather than a networking project.

Telecom operators face a more complicated result.

The underlay fiber, metro and long-haul transport still depends on carrier and colocation infrastructure, but the customer relationship and service abstraction shift toward the hyperscalers.

A programmable private Azure-AWS line could pressure high-margin private line, MPLS and managed IP/VPN revenue when enterprises can provision the connection inside a cloud workflow.

Carriers still have possible positions in the stack.

Operators can combine multicloud interconnects with SD-WAN, private 5G, network slices and edge computing, or host landing zones and points of presence with last-mile access, custom service levels and security controls.

The same programmable interface also points toward telecom network APIs that could let workloads request cloud and underlay connectivity properties in one motion.

Pricing remains the commercial test.

During preview, Azure is not charging service fees or Azure-side data egress for the interconnect, a strong incentive for data-heavy AI users.

Production pricing has not been specified, and the eventual comparison with carrier private-line rates will decide how disruptive the managed interconnect becomes.