This makes your company account's appointments appear in your smartphone's calendar app as well (e.g. Apple Calendar, Samsung Calendar or Google Calendar).
Steps
Install the Microsoft Outlook app (App Store, Google Play) and sign in with your company account.
In Outlook, tap your profile picture in the top left, then the gear (Settings).
Under Mail accounts, select your company account.
Turn on Sync calendars and confirm the calendar access prompt with Allow.
Open the calendar app and turn on the calendars of your Outlook account in the calendar list.
Important
The Outlook app must stay installed, otherwise syncing stops.
Don't restrict battery saving for Outlook too much, otherwise appointments may appear with a delay.