Access your OneDrive for Business accounts on your Windows phone with the same OneDrive app. Using the app to upload, share, and work with files in your OneDrive for Business account is the same as it is working with your personal account.
Add a OneDrive for Business account on your Windows phone
In OneDrive, tap Menu > Account Settings.
Tap Add account, then tap Work or school account.
Enter the sign in information you use for your OneDrive for Business account, then tap Sign in.
Note: To sign in to OneDrive for Business, your organization needs to have a qualifying SharePoint Online or Office 365 business subscription plan, or your organization needs to have its own SharePoint Server deployment. You can't sign in with an account from an on-premises directory.
If you have a problem signing in with your OneDrive for Business account, try using your phone's web browser to sign in at https://portal.office.com/onedrive, or contact your IT department.
Switch between accounts
Your OneDrive app in Windows phone lets you in to your personal OneDrive account and one or more OneDrive for Business accounts.
Tap Menu at the top of the screen, and then tap the account you want to use.
Note: You can have multiple OneDrive for Business accounts with the OneDrive app, but only one personal account.