I do not have the /craft/storage/runtime/logs/ folder I am trying to set up SMTP emails using Microsoft 365 and the settings are not working so I need to dig into the logs to find out why.

When I go to find the folder it is not there. Instead I have a /craft/storage/logs/ folder but this does not seem to contain the file containing email test logs - [exception.Craft\EmailTestException]

I have tried turning dev mode on to see if that changed the logs I was getting, and it does, but I am still not getting the logs I need.
Looks like that article needs to be updated for Craft 3.

In Craft 3, the logs folder is at storage/logs and you can search for [error] and find the one related to email sending.