Setting up emails in the Desktop version

I need help setting up my clients email addresses, I’m new to M and have not seen anything relevant posted in the forum regarding the Desktop Version of M. My business is engineering consulting, and I have about a half dozen clients that i regularly invoice. As prior user of QuickBooks, I’m transitioning to a desktop only accounting software because of the obvious risks associated with their new “cloud” -subscription approach to providing accounting software!

See Troubleshoot email issues | Manager
You will also need to enable the internal pdf generator at settings-> obsolete features

This is done when defining customers. There is a Guide that includes this.

On the contrary, except for discussions on user authorisations and customer portals, see the FAQs at Manager.io, you will notice that the only difference between the Desktop version and the Cloud+Server versions is:

Desktop edition is single-user software. Businesses requiring multi-user capabilities or remote access will use cloud edition which is not free.