Hello,
I've tried every trick and formatting option possible to prefill the contact field on a form using the contact field from another sheet. The contact list looks like the screenshot below. The true field name in the sheet of Product Line Manager is PLM I've tried
?PLM=Kevin%20Hietpas%20%28khietpas%40email.com%29
?PLM=Kevin%20Hietpas
?PLM=Kevin%20Hietpas%20(khietpas%40email.com)
?PLM=%28khietpas%40email.com%29
?PLM=(khietpas%40email.com%29)
?PLM=khietpas%40email.com
and all the above replacing %40 with @