如上图，只有第一个【产品已激活】的2019许可是有效的，其它，如：2016及需要激活的2019，都是多余，那如何删除这些没用信息？

1. 以管理员身份，用命令模式，进入目录：c:\Windows\System32

2. 查看默认安装目录的office授权信息：

cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /dstatus

------我电脑显示信息如下------

Microsoft (R) Windows Script Host Version 5.812
版权所有(C) Microsoft Corporation。保留所有权利。

---Processing--------------------------
---------------------------------------
PRODUCT ID: 00413-20000-07685-AA966
SKU ID: 5f472f1e-eb0a-4170-98e2-fb9e7f6ff535
LICENSE NAME: Office 19, Office19ProPlus2019MSDNR_Retail edition
LICENSE DESCRIPTION: Office 19, RETAIL channel
BETA EXPIRATION: 1601/1/1 星期一
LICENSE STATUS:  ---OOB_GRACE---     【不显示为：---LICENSED---，即为无效许可授权，记录最后key值：PWHPT，准备清理】
ERROR CODE: 0x4004F00C
ERROR DESCRIPTION: The Software Licensing Service reported that the application is running within the valid grace period.
REMAINING GRACE: 29 days  (43162 minute(s) before expiring)
Last 5 characters of installed product key: PWHPT
---------------------------------------
PRODUCT ID: 00414-50000-00000-AA119
SKU ID: 85dd8b5f-eaa4-4af3-a628-cce9e77c9a03
LICENSE NAME: Office 19, Office19ProPlus2019VL_KMS_Client_AE edition
LICENSE DESCRIPTION: Office 19, VOLUME_KMSCLIENT channel
BETA EXPIRATION: 1601/1/1 星期一
LICENSE STATUS:  ---LICENSED---        【当前office 2019正常有效许可授权，知道就行】
REMAINING GRACE: 179 days  (259170 minute(s) before expiring)
Last 5 characters of installed product key: 6MWKP
Activation Type Configuration: ALL
DNS auto-discovery: KMS name not available
KMS machine registry override defined: 100.100.0.10:1688
Activation Interval: 43200 minutes
Renewal Interval: 43200 minutes
KMS host caching: Enabled
---------------------------------------
PRODUCT ID: 00339-10000-00000-AA218
SKU ID: d450596f-894d-49e0-966a-fd39ed4c4c64
LICENSE NAME: Office 16, Office16ProPlusVL_KMS_Client edition
LICENSE DESCRIPTION: Office 16, VOLUME_KMSCLIENT channel
BETA EXPIRATION: 1601/1/1 星期一
LICENSE STATUS:  ---LICENSED--- 【虽然显示为：---LICENSED---，但最新安装是Office2019, 也算是无效许可授权，记录最后key值：WFG99,准备清理】
REMAINING GRACE: 179 days  (259170 minute(s) before expiring)
Last 5 characters of installed product key: WFG99
Activation Type Configuration: ALL
DNS auto-discovery: KMS name not available
KMS machine registry override defined: 100.100.0.10:1688
Activation Interval: 43200 minutes
Renewal Interval: 43200 minutes
KMS host caching: Enabled
---------------------------------------
PRODUCT ID: 00219-40000-00000-AA445
SKU ID: e13ac10e-75d0-4aff-a0cd-764982cf541c
LICENSE NAME: Office 15, OfficeVisioProVL_KMS_Client edition
LICENSE DESCRIPTION: Office 15, VOLUME_KMSCLIENT channel
BETA EXPIRATION: 1601/1/1 星期一
LICENSE STATUS:  ---LICENSED--- 【虽然显示为：---LICENSED---，但最新安装是Office2019, 这个是Office 15(我也不知道这是什么东东)，记录最后key值：RM3B3,准备清理】
REMAINING GRACE: 179 days  (259171 minute(s) before expiring)
Last 5 characters of installed product key: RM3B3
Activation Type Configuration: ALL
DNS auto-discovery: KMS name not available
KMS machine registry override defined: 100.100.0.10:1688
Activation Interval: 43200 minutes
Renewal Interval: 43200 minutes
KMS host caching: Enabled
---------------------------------------
---------------------------------------
---Exiting-----------------------------

3. 清理无效许可授权

c:\Windows\System32>cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /unpkey:PWHPT
c:\Windows\System32>cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /unpkey:WFG99
c:\Windows\System32>cscript "C:\Program Files\Microsoft Office\Office16\ospp.vbs" /unpkey:RM3B3

4. 执行完上述操作，再查看Office产品信息时，只剩下一个【产品已激活】的提示，其它异常的都没有显示了!