Solution trouvée ici : https://video2.skills-academy.com/en-us/answers/questions/1605321/is-anyone-else-having-problems-with-high-cpu-consu
Workaround :
- go to C:\Program Files\Azure Workload Backup\bin\plugins\SQL and open PluginManifest.json
- Change the value of AllowCommunicationThroughNamedPipes from true to false
- Open TaskManager and Stop AzureWLBackupPluginSvc and AzureWLBackupInquirySvc. Restart AzureWLBackupCoordinatorSvc.