Send in Bulk - Option 'I need to sign' is missing

Hi Everyone,

I'm trying to use the feature 'send in bulk' without sign-off the document, Unfortunately the option 'I need to sign' is not shown, hence the document can be delivered only with my signature. My Adobe Acrobat Sign plan is for Enterprise, I don't know if this could have some relation with this missing option..

Do you have any idea how to fix it?

Cheers!!