 Attention all Army CAC holders. You may lose access to Army networks, applications, and data if you don't act soon. As part of the Army's network modernization efforts, approximately two-thirds of CAC holders will need to activate their personal identity verification authentication certificate that already resides on their CAC to ensure uninterrupted access. If your CAC was issued prior to February 24th, 2018 and expires after March 31st, 2019, you must take action. Go to DMDC Rapid Self-Service ID Card Office online no later than March 31st, 2019. Instructions on how to activate your PIV auth certificate are on the site. If your CAC was issued after February 24th, 2018, your PIV authorization certificate is already active and no further action is needed. Identity is the new security perimeter. Protect the Army network.