How to rollback the upgrade of the minimum TLS version from 1.0 to 1.2 in Cosmos DB

Hello Datto De los rios, Jorge Antonio

I understand that you want to know whether you can roll back the version from 1.2 to 1.0 or not.

Please be informed that Azure Cosmos DB enforces a minimum TLS version for security reasons, and currently, the service-wide accepted version is TLS 1.2. Starting August 31, 2025, support for TLS 1.0 and 1.1 will be discontinued. If your account has been upgraded to TLS 1.2, rolling back to TLS 1.0 is not supported due to these security policies.

Kindly please refer the below document,
https://azure.microsoft.com/en-us/updates?id=update-retirement-tls1-0-tls1-1-versions-azure-services

You can also get the current value of the minimalTlsVersion property by using Azure CLI or Azure PowerShell.

Get current value via Azure CLI

To get the current value of the property using Azure CLI, run the command:

subId=$(az account show --query id -o tsv)
rg="myresourcegroup"
dbName="mycosmosdbaccount"
az rest --uri "/subscriptions/$subId/resourceGroups/$rg/providers/Microsoft.DocumentDB/databaseAccounts/$dbName?api-version=2022-11-15" --method GET

Get current value via Azure PowerShell

To get the current value of the property using Azure PowerShell, run the command:

Get-AzCosmosDBAccount -ResourceGroupName myresourcegroup -Name mycosmosdbaccount

https://learn.microsoft.com/en-us/azure/cosmos-db/self-serve-minimum-tls-enforcement#how-to-verify-minimum-tls-version-enforcement

Please do let me know if you have any further concerns. I am happy to address.