Symptom:
According by azure doc, seems “Public IP” supports “Zone-redundant” when “Sku” is “Standard”. After tried with rest api, seems it failed and threw below error message while passing “Zone-redundant” to service side. If it's a bug, could you help to fix it? Thanks.

PUT https://management.azure.com/subscriptions/xx-xx-xx-xx/resourceGroups/acctestRG-pip-tester2/providers/Microsoft.Network/publicIPAddresses/acctestpublicip-tester2

Request body:
{
"location": "westus2",
"properties": {
"publicIPAllocationMethod": "Static",
"publicIPAddressVersion": "IPv4",
"idleTimeoutInMinutes": 4
},
"sku": {
"name": "Standard"
},
"tags": {},
"zones": [
"Zone-redundant"
]
}

Response body:
network.PublicIPAddressesClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="InvalidAvailabilityZone" Message="The zone(s) 'Zone-redundant' for resource 'Microsoft.Network/publicIPAddresses/acctestpublicip-tester2' is not supported. The supported zones for location 'westus2' are '1,2,3'"