Classify files in OneDrive Business using API

suryagarg 

Microsoft's APIs and capabilities might have evolved since then.

Here is the general guidance on how you could achieve classifying files in OneDrive for Business using APIs:

To classify files in OneDrive for Business using retention labels through API, you typically need to use the Microsoft Graph API. Retention labels are part of Microsoft 365's information governance and compliance features. Here are the general steps to achieve this:

1. Create a Retention Label in Microsoft 365 Compliance Center: First, create a retention label that represents the classification you want to apply to files. Make sure it is configured to be manually applied and doesn't have any retention policy if you only want to use it for classification.
2. Authenticate Your Application: Set up your Node.js application with the necessary permissions and authentication to access the Microsoft Graph API. You mentioned using a daemon application for authentication, which is a common approach for server-to-server communication.
3. Use Microsoft Graph API to Apply Label to Files: Use the Microsoft Graph API to apply the retention label to specific files in your OneDrive for Business account. You can use the Update method of the DriveItem resource to set the sensitivityLabel property, which also works for applying retention labels.

Here is a simplified example of how you might use the Microsoft Graph API in Node.js to update a file with a retention label:

const axios = require('axios');

const accessToken = 'YOUR_ACCESS_TOKEN';
const fileId = 'FILE_ID';
const labelId = 'RETENTION_LABEL_ID';

const headers = {
  Authorization: `Bearer ${accessToken}`,
  'Content-Type': 'application/json'
};

const data = {
  sensitivityLabel: {
    id: labelId
  }
};

axios
  .patch(`https://graph.microsoft.com/v1.0/me/drive/items/${fileId}`, data, { headers })
  .then(response => {
    console.log('Label applied successfully:', response.data);
  })
  .catch(error => {
    console.error('Error applying label:', error);
  });

Please note that this is a simplified example, and you should handle errors, token expiration, and authentication securely in your actual application. Also, refer to the latest Microsoft Graph API documentation for any changes or updates to the API endpoints and data structures.

Before implementing this solution, I recommend checking the latest documentation and resources related to Microsoft 365 compliance features and the Microsoft Graph API, as there might have been updates or changes since my last update.

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