Reminders from shared calendars bugging colleagues all day.

So we recently switched from XP to Windows 10 (yes that's a big jump!) and in the process started using office365, moving all our calendars and mailboxes to Outlook 2016. The central IT department did all this and it was a relatively smooth transition.

Now unlike most of my colleagues who only had to set up their new PCs once, I hotdesk, so I'm using a different PC every day. As a result I go through a short process of registering my account and setting up my profile each time I use a new machine. Thankfully this is now rare because I've spent months getting on all the PCs in the building.

However, on one particular machine, after I set up, I started getting all the reminder notifications for all the appointments in all the shared calendars (over a dozen). It only happens on this one PC, so I am guessing that there was some hotkey I may have tripped accidentally that day. It's a bit of a bummer because I can't just dismiss all notifications, I need the ones from my own calendar. I asked central IT to look at it but they had no idea what to do and said it was just something in the options, I should google it. Well I googled it and duckduckgoed it, and other people are having the same issue but I can't find a simple solution. Oh well, I don't sit at that desk often, maybe I can just put up with it.

Just this week, a similar thing has started happening to me on just one of the shared calendars, at another desk. Perhaps it is because appointments in this specific calendar are rare, and I haven't noticed it before? Today my boss has also noticed reminders she doesn't need popping up from a shared calendar.

So I'm coming here to ask what the dealio is and what can be done at user level, since IT are not interested in helping us out?

There must be an option per calendar that could straighten this out, but where is it? Microsoft can't have dropped the ball surely? :P