OneDrive

This plugin is NOT an official Microsoft / OneDrive product. The plugin just uses Microsoft's OneDrive's public API.
After the authorization, the plugin can read your name and email, and read and write files in your OneDrive's /Apps/remotely-save folder.
If you decide to authorize this plugin to connect to OneDrive, please go to plugin's settings, and choose OneDrive then follow the instructions.
Password-based end-to-end encryption is also supported. But please be aware that the vault name itself is not encrypted.
If you want to sync the files across multiple devices, your vault name should be the same while using default settings.

FAQ

This plugin only works for "OneDrive for personal", and not works for "OneDrive for Business" (yet). See #11 to further details.

Mystically some users report that their OneDrive generate /Application/Graph instead of /Apps/remotely-save. See #517.

The solution is simple:

Backup your vault manually.
Go to onedrive website (https://onedrive.live.com/), and rename /Application/Graph to /Application/remotely-save (right click on the folder and you will see rename option)
Come back to Obsidian and try to sync!