while creating a new schedule, I came across an issue where I can only edit budgeted units on the Resource Assignments tab over a 2.5year time period.
In the attached image, there is a Salary employee working over the course of 5 five years. Being a salary employee, he will burn 173.33hours a month, totalling 2080hours a year. therefore, I am trying to set the budgeted units each month to 173.33.
This time frame issue applies to all resources.
Does anyone know why I can only modify budgeted units over this two and a half year time?

Thank you in advance for any help on this issue,
-BTF