Exchange Server 2019 and Outlook Mobile App Andriod

Hello,

  We have exchange server 2019 on premises server with windows server 2019 AD. I have a strange problem, when configuring outlook on Andrion/ios app the account repeatedly ask for the password even though the password is correct. If I use another email client like Edison or Gmail client the accounts works very well. The problem is only with the outlook mobile application, any help will be appreciated.