Here are the steps to add a location to a recurring event in Microsoft calendar:

1. Open the ‘Calendar’ app on your mobile device or computer.
2. Browse to the ‘Events’ tab or view for the event you want to add a location to.
3. Click the ‘More’ icon and select ‘Recurring event’ or ‘Set location’.
4. Enter the address of the location you would like to add.
5. Click ‘Save’.