On the page it shows OneDrive as one of the possible cloud storage options. However I can’t find anyway to add onedrive to my account. I only see a way to add Dropbox, Google Drive, and Box (Which isn’t even shown on that page?)
See the Setup guide at the link below, but I believe your account has to be added to the Beta and you have to enable Plex Cloud before you add a cloud provider. If you got the link in your email, chances are you are in. I didn’t sign up for it but got an invite anyways.
Setting up Plex Cloud for the first time
Sign in to Plex Web using this link.
Click Set up Plex Cloud at the top of the server selector.
Review the new beta user message and click Let’s Do This!
Choose the Cloud storage provider you want to start with. You will have the option to add additional storage providers later, if desired.
We’ll send you over to your chosen Cloud storage provider so you can give Plex authorization to access your files.
Your Plex Cloud server will “wake up” and begin scanning your Cloud storage provider. This may take a while if you have lots of content.
Ah I didn’t notice it there in the top left I was looking at cloud sync, It works but the 2gb limit kills it for me, oh well :-(. Really wish Cloud Sync worked with OneDrive would have much much preferred that