When OneDrive uploads a file that has been encrypted with EFS (Encrypted File System), it uploads the unencrypted version of the file. It is obviously inappropriate to upload encrypted files in plaintext ESPECIALLY for a cloud provider.

A simple fix is to respect the EFS encryption of files and use the existing APIs to upload the RAW encrypted data, allowing users to encrypt sensitive files that are still encrypted in transit and at rest on OneDrive servers.

For example, you can use these API calls to get access to the encrypted contents:

The way you open an encrypted file in order to read its raw encrypted contents (e.g. for a backup/restore application) is to use the:

OpenEncryptedFileRaw,
ReadEncryptedFileRaw,
WriteEncryptedFileRaw, and
CloseEncryptedFileRaw

*English follows Japanese

■Title(件名)：OneDrive for Business にて再生可能な動画について

Provide the functionality to playback the videos smoothly regardless of the interfaces.
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■Description(内容):
現在、アンドロイドで撮影した動画を OneDrive for Business にアップロードしているが、モダン UI で​再生ができない。ブラウザーは Internet Explorer を利用している。また、従来の UI では再生ができる。
特殊なコーディングをした動画ではなく、一般的な端末で撮影した動画となるため、モダン UI でも再生できるようにしてほしい。

Recently, I am uploading the videos shooted by the Android devices and use them in OneDrive for Business. However, I feel inconvenient that the users cannot playback the videos in the Modern UI so far. Incidentally, all videos will be able to playback by switching to the Classic UI on a browser in the Internet Explorer.

There is no such video as configured with the special codings, therefore, we hope the same availability of service will be provided in the Modern UI as well.

Thank you for your consideration.

It would be nice to be able to upload multiple files to OneDrive and then, once they're uploaded, join them together into one file.

On Windows, this can be achieved through the following command:

copy /b 1.txt + 2.txt + 3.txt all.txt

It would be great for this functionality to be available on OneDrive too. Amongst other uses, this could be useful for working around issues with uploading large files.

As there isn't a method for extending the expiry date of an upload session, the user is given a deadline by which they must complete the uploading of their file.

The following are some examples of circumstances which would hinder the uploading of a large file:

- Slow upload speed
- Internet service provider usage limits for particular timeframes
- Intermittent computer usage (and therefore intermittent uploading)

A contrived example of such a user is one who only has home computer access on Saturday evenings. This user could be unable to complete the upload of their file before the expiry date of the upload session.

This issue could be mitigated if this proposed file appending functionality is implemented – the above example user could commit their upload session at the end of Saturday and create a new upload session on subsequent Saturdays until all file parts are uploaded, at which point they could be joined to form a single file.

Tags: cat, concat, split, chunk, part, multiple files, multi-volume

Our "Xara Online Designer" web application implements its own filepicker that presents a unified interface to the cloud providers we have integrated with our app (Google Drive, Dropbox and soon OneDrive).

Our servers generate thumbnails for our custom (.xar) file format, ensuring our picker can display thumbnails for our custom file-type. However we want to send those thumbnail images back to OneDrive, so they appear within the OneDrive web application (https://onedrive.live.com). To do this we make use of OneDrive's REST thumbnail operations ("Upload a custom thumbnail on an item" i.e. the "PUT /drive/items/{item-id}/thumbnails/0/source/content" operation).

Whilst this works correctly, it has the side-effect of changing the file's modified date. This is unexpected as we're only updating the file's meta-data and not the actual contents of the file i.e. we would only expect the file's modified date to change when the actual file contents are changed.

Is there any way we can prevent the modified date changing? if not we would be grateful if the OneDrive team could consider making this change,