Hello,
I'm using a ArcGIS server/portal federated, version 10.8.1.
Yesterday the applications and webmaps stopped working.
The portal gave an error 500. The ArcGIS manager stopped working. The Portal admin stopped. The ArcGIS server admin STILL WORKS.
I looked for a solution and found what looks like a problem with the update identity store page.

Do I have to edit this manually and add the user and password according to the following page?

If so, which user is it? The domain user that runs the server/portal in the background? Or the admin user of the portal?
Thank you for any help!
Marcelo