CORS Error

[vijaybadugu]

I was getting allow -origin header errors when i tried to access the https://Survey123.arcgis.com?PortalUrl=<Portal Url>. 

ArcGIS Enterprise 11.5 with IWA Identity. Could you please suggest on this 

[SimonSchütte_ct]

Did you try adding https://Survey123.arcgis.com  to the "Allowed Origins" list?
Portal for ArcGIS  -> Organization -> Settings -> Security

[vijaybadugu]

I tried to add it to domain list and did not work.