Answer
Lightning Payroll has a mechanism for monitoring and estimating employee LSL entitlements as at key milestone dates - such as their anniversary date - depending on their state.
You can enable/disable this option under Settings >> System Leave >> Show a warning when employees exceed state-defined long service leave entitlements? . With this option enabled, the software will do a basic scan of the employee's LSL history each time a pay gets saved. The app then provides a generic estimation of how much leave the employee is entitled to, which may not be the same as the live leave balance you'd see in the Pays or Employees screens.
Below is an example of why this warning might appear, and how it performs its estimation.
Please Note: This warning is purely an estimation and cannot be 100% accurate due to external variables the software is not aware of. Please disregard or disable the warning if it is not accurate enough for your purposes.
In the above example you can see that in the context of a 2024 pay, the employee is eligible to use their LSL accrued as at 2022 (since they started work in 2012) but they are not eligible for any accruals after their ten year anniversary until they hit their 15 year milestone. This example is for NSW but the program will adjust for each other state.
The 329.3346 hours accrued as at the 10 year anniversary is a very rough calculation made using the same default parameters used under Employees >> Leave >> Leave Entitlement Adjustments >> LSL Balance Calculator (see below). Again, this estimate is not as intelligent or accurate as a pro rata accrual and should be taken as a helpful hint only, not strict truth. If an employee has had periods of unpaid leave or has changed their employment load from part-time to full time (among other reasons), then this estimation will likely be incorrect. If so, please disregard, or disable and instead manually monitor your employees' leave amounts and when they can be taken.
The image above shows the ten years accrual for an employee who started on Jan 5th 2012. Their ten year anniversary is Jan 5th 2022. Assuming their current award hours per week (38) at 8.67 weeks accrued every ten years, they should be entitled to 329 hours and 36 minutes LSL (after taking leave taken into account). Their current LSL balance will have accrued beyond this amount, of course, but they are not eligible to use that excess (post 2022) accrual until their 15 year milestone, hence the alert.