Hello @John Cole
Welcome to Q&A forum!
To ensure we're aligned, may I confirm the following:
- Are you using a personal account or a business account ?
- Are you encountering any issues while adding your IMAP account to the new Outlook?
- Have you tried adding your IMAP account in Classic Outlook or the Outlook Web platform?
- Are you seeing any error messages during the setup process? (If possible, please share a screenshot or the exact error message you received.)
I look forward to hearing from you. I'm always here to support you with any further assistance.
Additionally, I’ve found some related articles that may help with this issue. Please take a look and see if they address your needs:
Add an email account to Outlook for Windows - Microsoft Support
POP, IMAP, and SMTP settings for Outlook.com - Microsoft Support
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