Synchronize the Office365 calendar with your Bitrix24.
Go to the Calendar section and click the Synchronize button.
Click Connect in the Office365 Calendar block.
Sign in to your Microsoft account by entering your username and password.
The connection setup will start and your calendars will be synchronized.
Now make sure the synchronization works as expected. Create an event in the Office365 calendar. It should immediately appear in the Bitrix24 calendar.
All events will be displayed in both calendars.