Check the current license status of Office;
- Open an Elevated (RunAsAdmin) CMD console
- cd \Program Files (x86)\Microsoft Office\Office15\
- cscript ospp.vbs /dstatusall > c:\windows\temp\ospp-out.txt
The text file will have a bunch of stuff (almost all possible license types), the idea is to see which, if any, are properly registered.
Mine looks like this (I removed the Visio stuff), so you have something to compare;
Microsoft (R) Windows Script Host Version 5.8
Copyright (C) Microsoft Corporation. All rights reserved.
---Processing--------------------------
---------------------------------------
SKU ID: 2b88c4f2-ea8f-43cd-805e-4d41346e18a7
LICENSE NAME: Office 15, OfficeProPlusVL_MAK edition
LICENSE DESCRIPTION: Office 15, RETAIL(MAK) channel
LICENSE STATUS: ---LICENSED---
Last 5 characters of installed product key: MYKEY
---------------------------------------
SKU ID: b322da9c-a2e2-4058-9e4e-f59a6970bd69
LICENSE NAME: Office 15, OfficeProPlusVL_KMS_Client edition
LICENSE DESCRIPTION: Office 15, VOLUME_KMSCLIENT channel
LICENSE STATUS: ---UNLICENSED---
ERROR CODE: 0xC004F014
ERROR DESCRIPTION: The Software Licensing Service reported that the product key
is not available.
---------------------------------------
---Exiting-----------------------------