What is a Length of Service Accrual?
A Length of Service Accrual is used to automatically increase a users allowance/balance once they've hit a certain number of months/years of service within your company.
What is the difference between an Allowance Increase and a Policy Change?
An Allowance Increase is used to increase a users allowance while all their other settings remain the same. This is most often used when time-off policies have not been created within the account.
A Policy Change is used to automatically bump a user from one policy to another when they reach a certain number of months/years of service within your company.