Troubleshooting: It could be the cache issue.
Resolution 1: Clean the email account cache.
Resolution 2: Remove and re-add Outlook app.
Go to Settings>App>Outlook, tap
Uninstall
Troubleshooting: It could be the cache issue.
Resolution 1: Clean the email account cache.
Resolution 2: Remove and re-add Outlook app.
Go to Settings>App>Outlook, tap
Uninstall