I have multiple email & calendar accounts and multiple PCs in different locations, and was looking for an alternative to Outlook (which I have used “all my life”) - eM Client seemed to be the best fit (after I tried others as well) … while not a “drop-in” replacement, I was able to modify my workflow to make it work … still learning the ropes, though. … biggest challenge: Switching from offline pst folders (which we could simple use the same files w/o reformatting).