Wrong login page

[EivindG]

Hi everyone, 

I have a javascript application which tries to reach a map located in our ArcGIS Online portal. The portal is configured to use log in with Azure AD, but when I use the following code and tries to load the Portal Item as in the example below:

            identityManager.registerServers([{
                server: arcGisConfiguration.portalUrl,
                adminTokenServiceUrl: "",
                tokenServiceUrl: arcGisConfiguration.tokenEndpoint
            }]),
            esriConfig.portalUrl = arcGisConfiguration.portalUrl;
            var oAuthInfo = new OAuthInfo({
                appId: arcGisConfiguration.clientID,
                portalUrl: arcGisConfiguration.portalUrl + "/sharing",
                popup: !1
            });
            identityManager.registerOAuthInfos([oAuthInfo]);
            let webmapId = arcGisConfiguration.relationship.webmapId, authenticationMode, activeRelationShip = arcGisConfiguration.relationship, esriPortal = new Portal({
                url: esriConfig.portalUrl
            });
            var item;
            new PortalItem({
                id: webmapId,
                portal: esriPortal
            }).load().then((function(item) {

I am directed to this Sign-In page instead of our Azure AD login:

When I enter the portalURL in the browser instead, the Azure AD login page shows up. Does anyone see what I have to change to also make the application work with Azure AD?