public async Task TestQueryByExtensionProperty() { var extPropertyName = _fixture.ExtensionPropertyName; Skip.If(string.IsNullOrEmpty(extPropertyName), "No extension property defined"); var userQuery = await _client.UserQueryCreateAsync(); userQuery .WhereExtendedProperty(extPropertyName, "1235453", ODataOperator.Equals) .Where(u => u.GivenName, "nikos", ODataOperator.GreaterThanEquals) .Top(20) .OrderBy(u => u.MailNickname); var extApp = await _client.GetB2cExtensionsApplicationAsync(); var extAppId = extApp.AppId; var expected = $"$top=20&$orderby=mailNickname&$filter=extension_{extAppId.Replace("-", string.Empty)}_{extPropertyName} eq '1235453' and givenName ge 'nikos'"; var actualDecoded = System.Net.WebUtility.UrlDecode(userQuery.ToString()); Assert.Equal(expected, actualDecoded); }