Gray out existing connections so they can't be connected with ExpressRoute.
Gray out existing connections so they can't be connected with ExpressRoute again and cause an outage.
Failed to create connection 'ExpressRoute-EUS'. Error: The ExpressRoute connection for Nrp Resource Uri: https://eastus.network.azure.com/subscriptions/GUID/resourceGroups/expressroute-rg/providers/Microsoft.Network/connections/ExpressRoute-EUS2 already exists with a different Nrp Resource Uri:https://eastus.network.azure.com/subscriptions/GUID/resourceGroups/expressroute-rg/providers/Microsoft.Network/connections/US-East2
"Do not allow redundant ER connection deployments to start. There is currently an error message but no block to starting a redundant connection deployment. This operation causes the circuit to lose connectivity."