Outlook calendar updates not updating
All versions of Outlook after Outlook 2013 are configured to automatically update when Microsoft makes new updates available.
However, these updates could get accidentally deactivated, which prevents scheduled updates from automatically downloading and being applied.
You can do this by turning on incoming email in your Share Point calendar settings.
If you email the event to the email address as an invitee, then any time you send out an update, that update will be reflected on the Share Point calendar.
She sets up a meeting request in the Year in advance one and adds herself as an attendee.
I can’t find any setting where that may have gotten turned off.