I was told to create a new thread for this topic vs commenting on soemone elese's thread.  I doubt this will go anywhere as it seems NONE of the issues on this forum get resolved.

Note to moderators...do not ask me in a private message to screenshot or do anything else becuase I can't document something that DOESN"T HAPPEN.

Here are the details of my configuration:

User A has an outlook.com account with a calendar that is shared with User B. Sharing is set to co-owner.

User B has an outlook.com account, and their Options on User A's calendar show a standard reminder of 15 minutes on "Calendars on your PC and mobile phone".

User A sets up an event, and ensures the event has a reminder. Reminder is on the event on User A's iphone as well as PC.

User B views their calendar on a PC prior to to the reminder time. The event is on their calendar but no reminder is set despite having set the default under Options-->User A's Calendar-->Reminders. There is also no reminder set on User B's iphone.

Why do all event attributes of User A's shared calendar except the reminder appear on User B's calendar?