Filter users in tenant based on an attribute value

Question

Running

https://graph.microsoft.com/v1.0/users?select=onPremisesExtensionAttributes 

on Graph Explorer gives the following response.

value": [
        {
            "onPremisesExtensionAttributes": {
                "extensionAttribute1": null,
                "extensionAttribute2": null,
                "extensionAttribute3": null,
                "extensionAttribute4": 1,
                "extensionAttribute5": null                
            }
        },
        {
            "onPremisesExtensionAttributes": {
                "extensionAttribute1": null,
                "extensionAttribute2": null,
                "extensionAttribute3": null,
                "extensionAttribute4": 2,
                "extensionAttribute5": null
            }
        },
        {
            "onPremisesExtensionAttributes": {
                "extensionAttribute1": null,
                "extensionAttribute2": null,
                "extensionAttribute3": null,
                "extensionAttribute4": 1,
                "extensionAttribute5": null
            }
        }
]

How do I update

https://graph.microsoft.com/v1.0/users?$select=onPremisesExtensionAttributes

to return only users with extensionAttribute4 = 1?

On trying

https://graph.microsoft.com/v1.0/users?$filter=onPremisesExtensionAttributes/extensionAttribute4 eq '1' 

I see:

"code": "Request_UnsupportedQuery", "message": "Unsupported or invalid query filter clause specified for property 'extensionAttribute4' of resource 'User'.",

Answer 1

Your filter query is correct, but it requires to add the ConsistencyLevel:eventual header to the request and $count query parameter.

/v1.0/users?$filter=onPremisesExtensionAttributes/extensionAttribute4 eq '1'&$count=true

Resources:

Advanced query capabilities

User properties