Hello JacobT! Welcome to the Centrify Community Portal.
We currently do not have the syntax available that will allow you to query and provision the Manager's attribute e-mail address for a user account.
If there is a particular application you are attempting this for, it would helpful to provide the name of the app and screenshot of the user's account in the application. With this information we could try to provide a workaround to query the e-mail address of the Manager and have it provisioned under the user's account.
Let me know if this works for you.
Thanks,
Kequa