Chat online with our Customer Relations, E-Support and Technical Support teams during the hours listed below.   Product returns, order status or post-sales assistance. For general CDW questions and concerns • E-mail: Customer Relations • Phone: 866 782-4239 Monday-Friday 7am-9pm CT E-Account, extranet or Web site assistance. For pre-sales questions please contact your account manager. For CDW.com and extranet support • E-mail: Site Support • Phone: 888 239-7270 Monday-Friday 9am-6pm CT Post-sales technical questions ONLY. For pre-sales questions please contact your account manager. For post sale technical help • E-mail: Technical Support • Phone: 800 383-4239 Monday-Friday 7am-7pm CT To use the On-line chat section, you’ll need to set up an extranet.