What is the phone number for acrobat XI pro support?

Call Customer Service at 1-800-833-6687.
Monday—Friday, 5am—7pm PT

Take a look at: https://www.adobe.com/support/crm_portal/no_product/

Or start from here: https://helpx.adobe.com/contact.html

Be prepared to pay for talking to a human being: 1 (800) 833-6687

You can chat with a support agent via http://helpx.adobe.com/contact.html - just keep on answering the questions until you get a button that says "Chat with an agent"

Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com