Restore Azure Cosmos DB

It depends on the backup mode that was enabled before the database was deleted.

If the account was using continuous backup, you can use point-in-time restore, as long as the delete time is inside the configured retention window. The restore normally goes to a new account.

If the account was using periodic backup, it is more limited. In that case I would open an Azure support request quickly and give them the account name, database/container name, region, and approximate delete time. Recovery is only possible if Microsoft still has a usable backup inside the retention window.

So the first two checks are: backup mode and retention period. If it was deleted more than 7 days ago, the configured retention window is the deciding factor.

Docs:
https://learn.microsoft.com/azure/cosmos-db/continuous-backup-restore-introduction
https://learn.microsoft.com/azure/cosmos-db/restore-account-continuous-backup
https://learn.microsoft.com/azure/cosmos-db/periodic-backup-restore-introduction