Hi Mavi,
Thanks for visiting our forum.
Please refer to the link provided by JP and see if it can fix the issue. If his reply is helpful, could you please help mark it as answer then other community members who encounter a similar issue can more easily find the useful one?
Then here we mainly focus on general questions on Outlook on Windows desktop, as per your specific query about setting up email account on tablet, it is encouraged to post to the Answers forum for better response:
https://answers.microsoft.com/en-us/newthread

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Best regards,
Yuki Sun
Please remember to mark the replies as answers if they helped.
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