Title: How to remove EnableMongo16MBDocumentSupport capability from Azure Cosmos DB to enable CMK encryption?

Question

Title: How to remove EnableMongo16MBDocumentSupport capability from Azure Cosmos DB to enable CMK encryption?

Shubham Raut 45

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:
json
CopyEdit
`[
  { "name": "EnableMongo" },
  { "name": "EnableMongo16MBDocumentSupport" }
]
`
I need to enable Customer Managed Key (CMK) encryption, but I’m getting the error: EnableMongo16MBDocumentSupport and CMK encryption are not supported together. I can’t find an option in the portal to disable EnableMongo16MBDocumentSupport. 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?

Saraswathi Devadula 12,675 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.
Shubham Raut 45 Reputation points

2025-08-12T09:03:03.4033333+00:00

Thanks alot Saraswathi Devadula . This was very informative response.

Accepted answer

0 additional answers

Your answer

Saraswathi Devadula 12,675 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.
Shubham Raut 45 Reputation points

2025-08-12T09:03:03.4033333+00:00

Thanks alot Saraswathi Devadula . This was very informative response.

Answer 1

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.
User's image

Reference:https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/how-to-configure-capabilities#available-capabilities

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

Share via

Title: How to remove EnableMongo16MBDocumentSupport capability from Azure Cosmos DB to enable CMK encryption?

0 additional answers

Your answer