# 2025.42 Infrastructure Changes

## Changes on Application environment

| **Change** | **Name** | **Default** | **Example** | **Required** | **Applications** | **Short Description** |
|------------|----------|-------------|-------------|--------------|-------------------|-----------------------|
| New        | FEATURE_FLAG_ENABLE_THINKING_STEPS_UN_13848 | undefined | FEATURE_FLAG_ENABLE_THINKING_STEPS_UN_13848='true' | no | next-chat | This feature flag enables the message execution step sidebar (primarily used for DeepResearch). If DeepResearch is enabled, this flag should be enabled as well. |
| New        | FEATURE_FLAG_ENABLE_DEEP_RESEARCH_UN_12630 | undefined | FEATURE_FLAG_ENABLE_DEEP_RESEARCH_UN_12630='true' | no | next-chat, next-admin | This feature flag enables deep research (experimental) |
| New        | `FEATURE_FLAG_USE_OPENAI_V1_13819` | undefined | `FEATURE_FLAG_USE_OPENAI_V1_13819='true'` | no | node-chat | This feature flag enables the use of OpenAI’s V1 endpoint. It’s currently experimental and should only be activated in testing environments. For more details, refer to the documentation linked [here](https://learn.microsoft.com/en-us/azure/ai-foundry/openai/api-version-lifecycle?tabs=python#api-evolution). |
| New        | `FEATURE_FLAG_SET_PRIVATE_FOLDER_ACCESS_DEFAULT_UN_13988` | false | `FEATURE_FLAG_SET_PRIVATE_FOLDER_ACCESS_DEFAULT_UN_13988='true'` | no | knowledge-upload | This feature flag enables private folder creation by default in the Knowledge base. |
| New        | `FEATURE_FLAG_ENABLE_THINKING_STEPS_UN_13848` | false | `FEATURE_FLAG_ENABLE_THINKING_STEPS_UN_13848 = 'true'` | no | node-chat | This feature flag enables the UI to respond and render `MessageLog` as Steps |

| **Author** | Solution Engineering |