Using Outlook for Android in business environments for email and scheduling
Hi Yesu1975,
Welcome here in Microsoft Community! Thank you for reaching us out.
We understand that you're having trouble with logging in your IMAP account in Outlook app for Android. However, since you've tried all the possible troubleshooting steps such as uninstalling and reinstall the app to no avail, we highly recommend that you contact our Outlook In-App Support for Android. They have the necessary tools to thoroughly check this matter on their end. You may follow the steps below on how to contact them:
Go to Settings > Help & Feedback > Contact Support.
To notify us and have us get back to you, simply reply to this post.