Outlook 2016 / 2019 does not end Outlook process when closing outlook and doesn´t start afterwards

Since summer 2019 i have the problem with 4 pc with outlook 2016 and outlook 2019 that when i close outlook the outlook process is not closed, i.e. outlook cannot be started anymore without deleting the outlook process manually.
The problem is described in case https://support.office.com/de-de/article/mein-outlook-l%C3%A4sst-sich-nicht-%C3%B6ffnen-oder-bleibt-beim-laden-des-profils-h%C3%A4ngen-6d9590bb-3c0f-4caf-9599-d5cf6b5d3bd0
But it is not solved. Reinstallation of office 2016 or 2019 remains unsuccessful.
Is there already a solution ?