Storing of old email Address in ProxyEmail of AD

Hi Everyone,
In Workday(Authorative Source) we have 2 worker records for the same user. One as contingent worker with termination date and other with Employee with a start date (this is created after user conversion)

Now, we need to pass the old email address of the user(email assigned to CW user) in one of the AD attribute (proxyEmail) and new email(assigned to Employee) to be stored in email attribute. . Could you please let me know how to achieve this?

if you have such a requirement, the best way is when ever new record is created with start date after conversion have one custom attribute in that new record that actually holds old email assigned to cw user. Try to create one custom attribute in workday and have a transform in ISC the writes value to workday new record as well.

Once you achieve this am assuming you know how to pass this to AD

Hi @Faizan854187 what exchange mode are you using.? Also, is it the same AD account?