Azure service updates > Public preview: ExpressRoute guided portal experience for multi-site resiliency
https://azure.microsoft.com/en-us/updates/exrguidedportalexperience/
With multi-site resiliency, you can configure your ExpressRoute circuits through more than a single peering location. This helps ensure that your’ private connection to Microsoft remains available even if one of the locations experiences an outage. The experience is targeted at helping you design a highly resilient ExpressRoute solution to connect their on-premises with Microsoft backbone and Azure Virtual Networks.
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