Your company adopts Zero Trust and replaces the legacy VPN with identity-based access for remote workers. Six weeks in, helpdesk tickets spike: users complain that access to internal apps breaks unpredictably throughout the day. What is the MOST likely root cause?
A. Insufficient bandwidth at the identity provider
B. Continuous authentication is re-evaluating trust signals and revoking sessions
C. DNS resolution failures between the client and the policy enforcement point
D. Certificate pinning conflicts with the new SSO provider