When you add the outlook account on the apple mail app. It will be sycning all types of data without any interruption. However, Some users may not be able to sync the data successfully on the iPad. When they add the email account on the iPad, It shows them an authentication or syncing related error.
If you are also unable to sync the outlook data on the ipad, do not worry here are the guide to fix it.
How to fix outlook not receiving emails on the ipad?
When outlook is showing the syncing error on the iPad. please check the internet connection on the it. most probably, the outlook settings are incorrect or there is something wrong with the WIFI or mobile data settings. that's why ipad is unable to reach to the outlook server.
If outlook is showing the authentication error on the iPad. please check the mail password. There are high chances of wrong password stored in the ipad. that's why it is unable to sync to the mail server. so go to the mail settings and update the live password on the iPad. now retry to sync the mail.
Some users are unable to receive the emails because of the data fetching issue. they have turned off the fetching. due to which, outlook is unable load on iphone. so you need to go to the mail settings and enable the fetch data. now retry to access the webmail again.
Please remove the current account from the outlook application and then retry to access the data. let's see what does it shows on your device now. If outlook keeps showing you the outlook error. you need to visit why is my hotmail not receiving emails? for more help.
If these steps doesn't work. I would suggest you install the outlook app, and then try to sign into the account through it. it will work fine on your devices.