In Outlook
- Select Calendar
- Choose File > Open & Export, then click Import/Export
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- Select options to export to comma separated file
- Then choose a location, give it a name, then click Finish
In Excel
Remove unwanted columns then make a table from the data i.e. Insert | Table | Specify columns and rows to use, click OK
From Design tab, choose Export | Export table to SharePoint list and go through the Wizard
In SharePoint
Create calendar view