About restore from a backup in Microsoft Azure Archive
After initiating restore, the rehydrate process in Microsoft Azure Archive takes time. For more information refer to the Microsoft Azure documentation. The rehydrate process completes when the data is transitioned to the Hot tier. The number of days specified while the configuring LSU measures the time the data will stay on the Hot tier. After this the data is transitioned to the Archive tier.
The number of days you keep the data in the Hot tier impacts the cloud provider cost.
You can modify the value of the rehydration period using the csconfig CLI. -post_rehydration_periodcommand.