Help with Configuring emailing from CRM

Hi

Many moons ago, setting up emailing from CRM was easy. Most people used Internal SMTP and it worked. I didn't because I felt that was only good for demo purposes. I used CDONTS. All that required was installing SMTP service in Windows and then configuring it to use the smarthost setting to point things to the Exchange server. On the Exchange you only needed to create a user and away you went. Doing it that way meant you could turn it on and off easily and see your mail in the intepub/mailroot folder. Also, emails went out via the Exchange which allowed message tracking.

Things have moved on from those simple days. Now in the world of Office 365 and hosted servers and heavy security, it's not quite so simple. In my set up, we have a customer on a hosted server in our data centre. They have their own Office 365 set up. It seems that the simplest thing is Exchange integration so they can use the lite plugin for emailing. However, what about emailing from CRM?

My thoughts are to set up Exchange integration, which seems quite straightforward except that Microsoft keep changing the back office interface which means none of the guides I find seem to work because the options proudly displayed in the guide bare little to no resemblance to what the use is seeing and I can't help them as I know nothing of Exchange configuration. So, what's the best set up with a hosted server and a customer's Office 365? Is there a decent guide for setting this up and allowing emailing from CRM? This particular customer I am working with is using CRM 2020 R1.