Do i have to transfer all my email accounts to Outlook?

Hello.

I want to transfer some of our business email accounts to Microsoft Outlook. Not all the business email accounts because not all the employees are users on Microsoft 365.

So for example we have 4 email accounts:

• mailto:username@example.com (user's primary email)
• mailto:info@example.com
• mailto:sales@example
• mailto:service@example.com

These email accounts are being used from some employees. We are using Mozilla Thunderbird. Some of them will be transfered to Microsoft Outlook. So i want to know if we will create the MX files, they will stop syncing with the mail accounts?

Thank you.