Same problem. I assume you add RSS Feed via Account settings?When adding it directly via right-click menu "RSS Subscriptions" the feed is working. Looks like an Outlook bug for me.
I ran into the same issue and based on the attached text file I made a blog post with screenshots of the recovery process. https://www.thierolf.org/blog/2021/cisco-ssm-on-prem-password-recovery-procedure/ Hope it helps.
