Office 365 is only compatible with TaskCentre versions BPA 2020 Update 1 and above, due to the necessary TLS 1.2 components only being present from this version onwards.
As long as you are using a compatible version, then you simply need to update your email credentials within TaskCentre to switch over.
For more information on using Office 365 with TaskCentre please see this article from the developers of TaskCentre, Codeless Platforms.