On GeoEvent Server 10.6.x, I am unable to register connections to AGOL servers. This was working in 10.3, which is still running on a different machine (until the TLS protocol change, that is, but hence the upgrade to 10.6).
The process I'm using is:
- Click 'Register ArcGIS Server'
- Name the connection
- Enter my Esri credentials
- Click 'Register'
The error I receive is 'Unable to generate token: invalid username and password.' However, this can't be the case, as I can log in to my organization using the same credentials.