Hi E_S_C
Good day!
Thank you for posting to Microsoft Community. We are happy to help you.
to narrow down this issue ,please provide some information below
1 what is the outlook version and IOS version :
What version of Outlook do I have? (microsoft.com)
2 can we test this on Android and Windows outlook to see if the same issue ?
in the same time , we can try reset Reset Account follow below steps :
- Open the Outlook app.
- Access the Menu by tapping on your Profile and tap on Settings
- Select the affected email account.
- Tap Reset Account.
Please reply us if the issue persist or you need more help
Thanks for your time and your understanding .
Sincerely,
Kevin | Microsoft Community Moderator