Microsoft has released the Microsoft Office for Mac 2011 14.3.1 Update. (105.6 MB) Although this update includes prior updates since 14.1.0, installation issues require first installing the 14.2.3 update on Mac OS X 10.7 (Lion) and OS X 10.8 (Mountain Lion) systems due to GateKeeper.
According to the update’s description it addresses an issue where Office for Mac applications may report an issue with licensing although the applications continue to work. Multiple users report issues with the Office365Service process, which enforces Office 365 subscription licenses, and alerts referencing: Error Code: 0xd0001000. Microsoft’s documentation does not indicate if these specific issues are fixed by the update.
The Office365Service process appears to run only if Office for Mac is activated using an Office 365 subscription. Customers running Office for Mac where the product is activated by entering a product key should not be affected, however, they should apply this update to keep fully up-to-date.