As an administrator, you can configure how much historical data is retrieved within Custom Reporting by following the below steps:
Click Configuration then click Settings.
Expand System Settings then click Global.
Search for Custom Reports - Absence Dataset - Absence End Date Limit then click into it.
Set the number of days in the past for retrieving absences based on their end date within the Absence dataset. Default is 730 days, increasing this value may increase data refresh times.
Search for Custom Reports - Employee Dataset - Employee Termination Date Limit then click into it.
Sets the number of days in the past for retrieving terminated employees based on their termination date within the Employee dataset. Default is 730 days, increasing this value may increase data refresh times.
📌Note: This improves system performance by limiting the amount of data retrieved.