Hi,

I'm Taiwo and I'd be happy to help you with your question. In this Forum, We are Microsoft consumers just like yourself.

Since you're using a GoDaddy domain and want to have multiple family email addresses with that domain, you can use that for email hosting as well. Microsoft 365 offers email services with custom domain support. You can set up email accounts for your family members using your domain within Microsoft 365. you have a few options:

1. Remove both the domain-based email account and the Plusnet email account from Outlook.
2. Add only the domain-based email account to Outlook and check if it appears correctly with the correct identity. Ensure that you are using the correct server settings provided by your email hosting provider (either GoDaddy or Microsoft 365).
3. Send and receive emails using the domain-based email account to ensure it's functioning properly within Outlook.
4. Once the domain-based email account is working correctly, add the Plusnet email account to Outlook as a separate account. Make sure you enter the correct server settings for the Plusnet account. By adding the accounts separately and testing each one individually, you should be able to resolve any conflicts or issues with Outlook displaying the accounts incorrectly.

I hope this helps ;-), let me know if this is contrary to what you need, I would still be helpful to answer more of your questions.

Best Regards, Thank You.