This will show you how to create an Outlook rule for an account other than your own using Outlook.Office.com.
Sign into outlook.office.com as the account you want create the rule on; in this example we will use the A/P account.
Once signed in locate an email that you want to create a rule for. In this example we will move Schaeffler invoices to the FAG folder, so look for a Schaeffler invoice email.
Right click on the email and choose ‘Create rule’
In the ‘Search for a folder’ box choose ‘Move to a different folder…’
Scroll through the list until you find the folder you want these messages to move to, then select that folder (in this example FAG)
Click OK