If your domain still uses FRS for SYSVOL replication (common in older Server 2008 R2 domains), Windows 11 clients cannot apply GPOs correctly. Migrate to DFSR using the dfsrmig tool before deploying Windows 11.
Windows 11 handles user profiles differently than Windows 7 or XP. If you are using Roaming Profiles or Folder Redirection: active directory win 11
Windows 11 mandates TPM 2.0. For domain-joined devices, this enables: If your domain still uses FRS for SYSVOL