Thanks Siriseng for once again replying J
Unfortunately I think the federation link in portaladmin was only exposed in 10.4
Logged in as admin in 10.3 I don’t see it.
We’ve had a fairly catastrophic failure, and despite my best efforts, can’t seem to overcome the multiple problems.
We are fortunate enough that our portal held little content and we are just going to republish to an upgraded 10.5 portal. ( I successfully upgraded 10.3 to 10.5, but the disabled Edit Settings still exists)
So, I will be attempting a new federation of the arcgis sever via portal admin (I do see the link for federation in 10.5 portaladmin) soon.
Best,
David