Mass adjust PA transactions

Hi,

Please share your inputs on how we can achieve this:

In PA we have some transactions as billable and some as non-billable.

At Project status change to 'XYZ', we want all PA Expenditures being marked either as billable or non-billable (depending on some business logic)

I can see the mass adjust button, but we don't want to do it manually.

Please share your thoughts on this.

Thanks,

Mohit