Azure Cosmos DB
An Azure NoSQL database service for app development.
Title: How to remove EnableMongo16MBDocumentSupport capability from Azure Cosmos DB to enable CMK encryption?
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Shubham Raut
0
Reputation points
Title: How to remove EnableMongo16MBDocumentSupport capability from Azure Cosmos DB to enable CMK encryption?
Body:
I have an Azure Cosmos DB account (Mongo API) that currently has the following capabilities enabled:
jsonCopyEdit
`[ { "name": "EnableMongo" }, { "name": "EnableMongo16MBDocumentSupport" } ] `I need to enable Customer Managed Key (CMK) encryption, but I’m getting the error:
EnableMongo16MBDocumentSupportand CMK encryption are not supported together. I can’t find an option in the portal to disableEnableMongo16MBDocumentSupport. Question: Is there a way to remove this capability from an existing Cosmos DB account, or do I need to create a new account without it? If a new account is required, what’s the best approach for migrating data with minimal downtime?
Azure Cosmos DB
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Saraswathi Devadula 10,855 Reputation points Microsoft External Staff Moderator2025-08-11T14:09:10.3533333+00:00 Hello Shubham Raut
unfortunately, it is not possible to remove the EnableMongo16MBDocumentSupport capability from an existing Azure Cosmos DB for MongoDB account. This capability cannot be disabled or removed, as it is a required feature for enabling 16MB document support.
If you need to enable CMK encryption, you will have to create a new account without this capability.**
**
Regarding the data migration, ADF is the best option and please refer the below document for more steps.
https://learn.microsoft.com/en-us/azure/data-factory/connector-mongodb?tabs=data-factory -
Saraswathi Devadula 10,855 Reputation points Microsoft External Staff Moderator
2025-08-12T05:19:23.79+00:00 Hello Shubham Raut
We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
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