I have found some tools to backup and restore much of a Intune setup, but not conditional access policies.
So I decided to create a little PowerShell module to backup and restore conditional access policies.
Backup-CondAcc -backupfolder c:\temp
Restore-CondAcc -importfile c:\temp\policy.xml
You find the tool on GitHub: https://github.com/jfremmegaard/Intune-Tools/tree/master/CondAccessBackupRestore
Please report any bugs and missing features to me