I have a user who is having issues with reminders on appointments sent to her.
With her default reminders set to off (i.e., File | Options |Calendar | Default Reminders is unchecked), when she receives an appointment even if the sender has put a reminder on it, her appointment that she has accepted will not have a reminder.
If she changes her default reminders to 15 minutes then every appointment that comes through will have a 15 minute appointment if the sender did not set a reminder and will have the sender's reminder period if the sender did set a reminder.
She has many appointments sent to here where she doesn't want a reminder. With the default set to off she then has to manually enter each appointment sent and set the reminder.
What would be ideal is that she doesn't have a default then she will receive all reminders sent to her, not what is actually happening in that if there is no default then no reminders get set.