Why is Chrome Always jumping backto login

hey, Im using Outlook in exchange only mode. The exchange is hosted locally, so why should i login with a micrsoft account in an AD-Domain environment?

May I know why my response is not helpful?

I better switch to english language as you are using translation tools and they are a mess.
I've alerady answered, you haven't really read my issue. You are using translation sofware, this may be the resaon why you not understanding my issue. I've also explained already, all this "clicki clicki" stuff was tried with different support people already, we are far behind of this type of error analysis, my frustration level reached alerady an extreme level. The issue is somewhere on the backend. I really want that someone analyse the backend and explain me WHY ON ALL SYSTEMS (ALL = MACOS, iOS, WINDOWS, iPADOS) and different mail clients (WHAT IS WELL INDICATING THAT THE ISSUE APPEARS IN THE BACKEND ALREADY!!!!!) ALL MAILS FROM UNKNOWN RECIPIENS ALWAYS (ALWAYS MEANS ALWAYS) COMMING TO JUNK AND THIS ONLY (THIS MEANS 100% ONLY) FOR THE OUTLOOK.COM MAIL ACCOUNT - the 2 other mail accounts aren't showing this weird behaviour.
Honestly, my frustration again grown a bit more as i see, that here are people with 0 language skills trying to offer support via translation tools and they are completly failing, i have to repeat again and again the same and i have no hope for a resolution.

There is a new problem: I cannot uninstall Onedrive - although I did restart the Laptop, there is always the message: Onedrive is open and can therefore not be moved to the trash.
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PS: I cannot see any login attempts in the Azure AD console while surfing to the SharePoint URL. So it seems, that the clients are really not trying to login automatically at all. (But why?)