When Outlook is not getting emails on the android phone. you should make the following changes into the android phone.
1. turn off the internet for a while, and then turn it back on.
2. Now turn off the airplane mode on the android phone.
3. Go to the account settings on the android phone and update the password.
4. Let's delete the current account and then re-add the mail account back into the outlook mail.
5. Some users are unable to access the outlook account because of the incorrect username or password errors. so you need to update these settings as well.
6. Go to the account settings and update the mail application.
So these are the steps to fix the outlook problems. you need to visit:
https://askprob.com/fix-outlook-not-receiving-emails-on-android-phone-best-guide/