How could I restore a Cosmos DB container if there is a periodic backup?

Is there a way to restore a Cosmos DB container after I accidentally deleted it? I just confused the live environment with a local Cosmos DB emulator.

When I go to the Settings – Backup & Restore it says:

Your account is on periodic backup mode. You can now change to continuous mode for a better backup and restore experience. Change to continuous mode

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Does it mean that it is still somehow possible to revert the delete operation? But I can not find an option to revert the deletion.

>Solution :

For Cosmos DB containers configured with periodic backup (as you’ve mentioned is the case here), Microsoft has very prescriptive guidance on how to potentially restore the data. TL;DR – you should file a support request with the Microsoft Azure support team as soon as is feasible (being sure to include all information they need as indicated in the linked article). Their word choice in the linked document strongly indicates a time-sensitive aspect to this, and a relatively short window in which you need to lodge such a request to ensure the best possible outcome.

I’ve reproduced the relevant bits from the linked documentation below for convenience/posterity (emphases mine):

Request data restore from a backup

If you accidentally delete your
database or a container, you can file a support ticket or call the
Azure support to restore the data from automatic online backups. Azure
support is available for selected plans only such as Standard,
Developer, and plans higher than those. Azure support is not available
with Basic plan.

To restore a specific snapshot of the backup, Azure Cosmos DB requires
that the data is available during the backup cycle for that snapshot.
You should have the following details before requesting a restore:

• Have your subscription ID ready.

• Based on how your data was accidentally deleted or modified, you
  should prepare to have additional information. It is advised that you
  have the information available ahead to minimize the back-and-forth
  that can be detrimental in some time sensitive cases.

• If the entire Azure Cosmos DB account is deleted, you need to provide
  the name of the deleted account. If you create another account with
  the same name as the deleted account, share that with the support team
  because it helps to determine the right account to choose. It’s
  recommended to file different support tickets for each deleted account
  because it minimizes the confusion for the state of restore.

• If one or more databases are deleted, you should provide the Azure
  Cosmos DB account, and the Azure Cosmos DB database names and specify
  if a new database with the same name exists.

• If one or more containers are deleted, you should provide the Azure
  Cosmos DB account name, database names, and the container names. And
  specify if a container with the same name exists.

• If you have accidentally deleted or corrupted your data, you should
  contact Azure support within 8 hours so that the Azure Cosmos DB team
  can help you restore the data from the backups. Before you create a
  support request to restore the data, make sure to increase the backup
  retention for your account to at least seven days. It’s best to
  increase your retention within 8 hours of this event. This way the
  Azure Cosmos DB support team will have enough time to restore your
  account.

In addition to Azure Cosmos DB account name, database names, container
names, you should specify the point in time to which the data can be
restored to. It is important to be as precise as possible to help us
determine the best available backups at that time. It is also
important to specify the time in UTC.