We just set up ArcGIS Online using a SSO, however the Organization Short Name is added with an underline.
I have changed the settings for the Username Format under New Member Defaults to Email Address Prefix. But this has no effect.
We do not wish to have the Organization Short Name added. We would like to have the username (which is equals the e-mail address provided by the IDP) the same as in our internal Portal for ArcGIS.
How can we change the default username created by users who login to ArcGIS Online using SSO?