Attachment functionality on HCM_ESS_WDA_1

Hi SAP ESS MSS Experts,

My client is upgrading from EHP 5 to EHP 7. Business function HCM_ESS_WDA_2 and HCM_ESS_WDA_3 are not activated yet. Only HCM_ESS_WDA_1 is activated. They want to enable attachment functionality on leave request application.

Question : does HCM_ESS_WDA_1 support attachment functionality?

Thanks.

Regards,

Johan