Sorry for the delay in response. Yes, this functioned as needed! Thank you, Sir @girish. Admittedly it took quite some time for me to get the time needed to sit down and "from scratch" it, so to speak. In the end, I'm likely going to make use of NextCloud's Email Client since internally we took a vote. NextCloud's email combined with that Calendar won out (despite my personal feelings regarding the added maintenance (black box-ish-ness) complexity and the "speed" (or lack there of) of their client).
Girish, thank you. In the end, your advice was solid. Entirely worked as needed. And it was only then that we, as a company, could make a final call to go a different direction for an email client.
Keep up the good work brother. Appreciate what you do!
Cheers,
Xand