Hello Aleksandr, Welcome to MS Q&A!
Reverting changes in a Cosmos DB container without a backup policy can be challenging, but here are a couple of approaches you might consider:
Manual Reversion: If you have documentation or logs of the previous state, you can manually update the container to restore the correct data. This requires careful validation to ensure accuracy.
Change Feed Utilization: If the change feed is enabled, it can help track modifications. Reviewing it may allow you to identify and revert specific changes.
Unfortunately, Point-in-Time Restore requires continuous backup to be enabled, which isn’t available in your case. Based on this, the two options above would be your best alternatives. Let me know if you need further clarification!
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Deepanshu