Dell PowerConnect W Clearpass 100 Software 3.9 Deployment Guide - Page 112
iOS Device Provisioning Failures, Symptom, Resolution
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iOS Device Provisioning Failures Symptom: Device provisioning fails on iOS with the message "The server certificate for https://... is invalid". Resolution: When using HTTPS for device provisioning, you must obtain a commercial SSL certificate. Self-signed SSL certificates, and SSL server certificates that have been issued by an untrusted or unknown root certificate authority, will cause iOS device provisioning to fail with the message "The server certificate for ... is invalid". A workaround for this issue is to install an appropriate root certificate on the iOS device. This root certificate must be the Web server's SSL certificate (if it is a self-signed certificate), or the certificate authority that issued the SSL certificate. This is not recommended for production deployments as it increases the complexity of deployment for users with iOS devices. 112 | Onboard ClearPass Guest 3.9 | Deployment Guide
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