Hello Silas
Can you try these steps:
Here are the steps to help you resolve the issue:
- Remove Certificate Registration Point site system role: Go to the Configuration Manager console, navigate to Administration > Site Configuration > Site Systems, and remove the Certificate Registration Point site system role. This will prevent any issues with certificate-based authentication.
- Remove Company Resource Access features: Go to Assets and Compliance > Overview > Company Resource Access, and disable or remove any policies related to:
- Email
- Certificate
- VPN
- Wi-Fi
- Windows Hello for Business profiles
- Review and update any custom configurations: Check your custom configurations, scripts, and policies to ensure they don't rely on these unsupported features.
- Backup your site: Before making any changes, take a backup of your Configuration Manager site to ensure you can roll back if needed.
- Wi-Fi
- VPN
- Certificate
- Email
- Upgrade your site: After removing the unsupported features, you should be able to upgrade your Configuration Manager site to version 2403.