Hi @Flynn, Karen ,
Welcome to our forum!
In order to better research your issue, please provide some related information:
1.What detailed version of Outlook in the new device?
2.What type of account have you configured in Outlook?(POP3, IMAP, or an Exchange account)
To avoid impact of version, please upgrade it to the latest.
Besides, restart computer in Windows clean mode and check if the issue persist.
Refer to the article below to start the computer in Clean Boot: How to perform a clean boot in Windows
Hope the above suggestion may help you.
If you need further assistance, get back to us and we will be glad to assist you.
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