Hello @Embla ,
Thank you for your question and for getting in touch. My name is Samuel and I would be more than happy to help you with your query.
I recommend that you consult the article below that talks about "Guidance on how to set up protected accounts", the necessary requirements and how to solve the main problems:
The simplest way to solve this is to downgrade to windows 10 and wait a few more weeks to upgrade back to windows 11 because this might just be a fearful bug.
In addition, I recommend that you post your question on the windows 11 forum, because this problem may have become general and it is very important that you also report it.
To do this, go to the link below and select the option "Ask a question" from the top menu and describe the entire problem, including images:
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