Integrating ONLYOFFICE with Rackspace Cloud Storage
Connect the Rackspace Cloud Storage service to use the connected cloud storage as a third-party storage when creating backups. It's also possible to use this cloud storage to store data and static content from your portal. Use Authorization keys to connect your portal to Rackspace Cloud Storage.
Bare Bones Instructions
If you decide to connect Rackspace Cloud Storage, proceed through these simple steps:
First of all. go to the Settings section. To do that, click the
icon in the right upper corner.Switch to the Integration tab.
Open the Third-Party Services page.
In this section, you will see all the third-party services you can connect your portal to. The most important part in the process of establishing the connection is to find application keys. If you want to connect a third-party service to your portal, first of all get the application ID (may be called app key, client_id, api key, etc.) and Key (app secret, client_secret, api secret, etc.). The way to obtain the connection keys differs from service to service. So choose the necessary service and follow the instructions:
Connect your Rackspace Cloud Storage to ONLYOFFICE 
- Go to Rackspace Cloud Control Panel.
- Sign in to your account.
- Click the username menu in the upper right corner of the control panel.
- Select the My Profile & Settings option,
- Scroll down to Security Settings,
- Click the Show link next to Rackspace API Key.
- Copy or write down
Rackspace API Key. To connect the Rackspace service, you'll also need to specify yourRackspace username, i.e. the username that you use to log in.