Query Azure AD Graph for B2C SignInName

Question

How do I query Azure AD Graph for a SignInName? i.e. I want to take the user's login-name and find the user object in the Azure AD Graph.

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I would assume I'm supposed to use $filter, right?

I tried: https://graph.windows.net/myB2Ctenant.onmicrosoft.com/users?api-version=1.6&$filter=signInNames eq spottedmahn

and I got:

The operand for a binary operator 'Equal' is not a single value. Binary operators require both operands to be single values.

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Ok, so maybe I'm suppoed to use the any operator so then I tried: https://graph.windows.net/myB2Ctenant.onmicrosoft.com/users?api-version=1.6&$filter=signInNames/any(c:c eq 'spottedmahn')

A binary operator with incompatible types was detected. Found operand types 'Microsoft.DirectoryServices.SignlnName' and 'Edm.String' for operator kind 'Equal'.

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Thinking that c:c is a lambda I then tried: https://graph.windows.net/myB2Ctenant.onmicrosoft.com/users?api-version=1.6&$filter=signInNames/any(c:c.value eq 'spottedmahn')

The child type 'c.value' in a cast was not an entity type. Casts can only be performed on entity types.

Reference: User Entity

Answer 1

You are close.

You must filter by the signInNames array and match by the value property of each array item:

https://graph.windows.net/{tenant}/users?api-version=1.6&$filter=signInNames/any(x:x/value eq '{emailAddressOrUserName}')