Performance Degradation with Azure

Some of our clients have experienced performance issues when they migrated into an Azure environment by comparison to a physical environment. It's believed that the performance issues were within the virtual networking layer within the Azure Hyper-V Host.
When the Proclaim and Citrix servers were grouped within the same subscription class, the performance was better when the Virtual Switching was removed from the equation.
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While Azure believes that anything under 10ms is optimal, the clients were seeing 1ms latency with delays up to 4ms between machines in the same grouping and between data racks. Removing the second virtualized layer of networking and going with pass-through between the switch and guest the latency was reduced to 1ms or less.
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If you're deploying Proclaim in Azure, it's recommended that you enable Accelerated networking on the Proclaim servers and the remote file storage if you're not using local storage and any remote access solution within Azure.
You should also group the Proclaim and Remote access servers within the same machine family, so the guests remain within the same switching and rack clusters
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​Related Microsoft Article