Azure REST API - $filter param for time delta throws ProviderError

Annish_Prashanth 

1. u need use '/' instead of '.'

2. seems the $filter in alert response need uppercase letter. 

https://management.azure.com/subscriptions/******/providers/Microsoft.Security/alerts?api-version=2019-01-01&$filter=Properties/AlertName eq 'Network_TrafficFromUnrecommendedIP' 

this works but if you change to 

https://management.azure.com/subscriptions/******/providers/Microsoft.Security/alerts?api-version=2019-01-01&$filter=properties/alertName eq 'Network_TrafficFromUnrecommendedIP'

will failed. event the response json array is lower letter here. hope this will help you.

            "properties": {
                "vendorName": "Microsoft",
                "alertDisplayName": "Traffic detected from IP addresses recommended for blocking",
                "alertName": "Network_TrafficFromUnrecommendedIP",
                "detectedTimeUtc": "2020-04-01T08:00:00Z",