How to incorporate the usage of AND when querying onPremisesExtensionAttributes/extensionAttribute in the MS Graph API?

I’m currently trying to query multiple values when it comes to onPremisesExtensionAttributes/extensionAttribute in MS Graph API.

I’m able to query this one:

https://graph.microsoft.com/beta/users?$count=true&$filter=onPremisesExtensionAttributes/extensionAttribute13 eq 'attr1'

But I want to query more values than attr1, but I haven’t managed to get it to work.

I’ve tried queries, such as these two:

https://graph.microsoft.com/beta/users?$count=true&$filter=onPremisesExtensionAttributes/extensionAttribute13 eq 'attr1' and 'attr2' and 'attr3'

https://graph.microsoft.com/beta/users?$count=true&$filter=onPremisesExtensionAttributes/extensionAttribute13 eq 'attr1'&$onPremisesExtensionAttributes/extensionAttribute13 eq 'attr2'&$onPremisesExtensionAttributes/extensionAttribute13 eq 'attr3'

>Solution :

the correct syntax should be

$filter=onPremisesExtensionAttributes/extensionAttribute13 eq 'attr1' and onPremisesExtensionAttributes/extensionAttribute13 eq 'attr2' and onPremisesExtensionAttributes/extensionAttribute13 eq 'attr3'

one filter param to include all conditions, and each condition is full – field eq ‘value’