Federation Fails Between Portal and ArcGIS Server

[TalluruRangaVital1]

I am getting below error message

Error: “Unable to connect to the server admin URL” or “Invalid token”.

Could you please share any supporting docs or resolution.

[VenkataKondepati · Accepted solution]

Hi @TalluruRangaVital1.

Please check the steps below and let me know.
Check Windows Services → ensure Portal for ArcGIS is set to Automatic (Delayed Start).
Verify content directory path access.
If Data Store on another machine, start Data Store first.