create a non-disruptive an Azure VNET address space update to ER
create a non-disruptive an Azure VNET address space update to advertise prefixes to expressroute. Currently there is no way to do this without knocking down the connection for a period of time - breaking connectivity between the azure data center and on-premise data center.
Thank you for submitting the feedback item! Can you please provide us some clarification on the scenario? There should be no disruption within Azure when adding additional prefixes to an address space of the VNet.