Absence Calendar Subject Area not showing all data

Summary:

When I run my report using the Absence Calendar Subject Area a large amount of data is missing.

I have tried running the Generate Daily Breakdown of Absence Details scheduled process, but cannot find a way of running this process for Inactive Users and even some of the Active users have no data.

Is there a process that I am missing that updates the rest of this data?

I followed the process below to activate the calendar area after updating the absence types to be included in the Daily Breakdown.

Generate Daily Breakdown of Absence Details Process

Any guidance appreciated.