So, I was able to solve this. Its a validation bug on the Discourse side the regex in the Discourse setting hasn’t caught up yet, so the admin UI rejects perfectly valid secrets with “Value doesn’t match…” error.
Go it to work by bypassing the validator and writing the secret straight to the DB. Now it works:
So probably this needs to be patched again as that’s the more acceptable and safer solution.
Ah! Thanks for sharing. I recently moved my forum to this very professional setup, as shown… And thought that the digital moving had caused my SSOIDs to break… Also Microsoft is defective in my case… Will investigate further. But thanks for this now!