Unlike non-subscription, the subscription flavors of Office 2010 require "not only the initial activation," but also " subsequent reactivations for the entire duration of the license."
"During the installation process, Professional Plus will automatically check the licensing and activate the product. The license assigned to Professional Plus subscribers is valid for 30 days. The Office Subscription Agent evaluates the subscription once a month. If the subscription is still valid, the product is reactivated for another 30 days," explained Microsoft.
"It's imperative that the Office Subscription Agent identify a valid license within 30 days of the last activation.
Otherwise the copy of Office Professional Plus 2010 enters what Microsoft call a 30-day "grace period."
And just like those running free versions of Office 2010, customers with Professional Plus will have their copies of productivity suite enter Reduced Functionality Mode if the Office Subscription Agent cann't find a valid subscription for 60 days. When the product enters Reduced Functionality Mode, users can reactive Professional Plus by connecting to Internet and ensuring that the licenses are active," added Microsoft.
When these conditions are met, users can type either of the following commands in a command prompt or the Run dialog box:
- OSAUI.exe /K (reactivates the Microsoft Online account associated with the password previously entered).
- OSAUI.exe /F (reactivates a different Microsoft Online account).