Using VALIDTO to Set Attribute to Expire

I am currently working to set and attribute to expire two days out from the last sync. I have been trying to use standard js code to calculate this date, but it seems IdM does not like that. What I am looking to do is the following:

On the WriteABAPUser pass in the Initial Load job, I would like to use the VALIDTO option on attribute ACCOUNTTEST to be set two days out from the current date.

Does anyone have any suggestions on how I can accomplish this. The ultimate goal is so that when a user has been removed from a system, this attribute with fall off two days later.

Any and all assistance is greatly appreciated. Thanks.

Kevin