I have just moved to W11 on a new machine. Managed somehow to get my email up on it and running, looks like I have been changed from POP3 to IMAP as email statuses (read/unread etc) change across devices (Laptop, phone).
My calendar has become stranded on the old W10 laptop, so started to investigate manually setting it up on the new one - which is New Outlook, and I presume I was running what is now called Classic Outlook.
My view of the New vs. Classic is that it is Simple vs, Feature Rich.
Regarding Classic I have been using for decades, and it always gave a maximum 2 weeks reminder, I have changed 2 to any number e.g. 36 weeks to give me very advanced warning of an event coming up. Imagine your daughter was engaged and the the wedding was 18 months away, you could set up various events for organising the wedding and set them up to remind you from 4 weeks to 78 weeks away. So I would just select any Day or Week in the drop down, the overwrite it to 17 Days or 14 weeks etc.
However, I can not get Classic Outlook to set up on the new machine, and using the New Outlook all it does is give a drop down with selections of hours, day and 1 week - which is not available to overwrite, any movement on that field results in the drop down menu again with limited options.
My next issue is how do the reminders work. On my old W10 (Classic) Outlook I would get a reminders panel appear as each reminder occurred. I could select each reminder and choose to either discard or snooze for a further period of time. Having just experienced my first test appointment on New Outlook, I received a noisy pop up which I had barely any time to read, before it suddenly vanished. I am left feeling will I ever see it again? I did not give it notice of how long to snooze, so presume that was it.....and I will start forgetting and missing appointments.
So my advice is try and get Classic Outlook to work, and I expect all the features will return that I enjoyed on my old W10 Outlook.