PROBLEM
In some instances, attempts to log in to Portal for ArcGIS for the first time fail, and new user accounts cannot be created. If the account is not created automatically upon login, organization-specific users may access the portal, though only with the privileges of a user without an ArcGIS organizational account.
Depending on the cause, choose one of the options below to resolve the issue.
Set the enableAutomaticAccountCreation setting to ‘true’
https://portal.domain.com:7443/<web adaptor name>/portaladmin
Properly configure ArcGIS Web Adaptor
Configure ArcGIS Web Adaptor in Internet Information Server (IIS) Manager correctly. For steps, refer to Portal for ArcGIS: Configure ArcGIS Web Adaptor to use IWA.
Get help from ArcGIS experts
Download the Esri Support App