Yeah, I can't seek a better answer than yours and can not express my appreciation! You are totally right! I deleted my Office key and my Outlook was deactivated too. That means Outlook key was deleted and replaced by Office key as you mentioned. It wasn't "hide" by somehow like I thought :) For me, I always compress and save this app along with key (IID, CID) for sure but didn't know that we only need insert the key to activate again. I find that this app still good too unless you forget to turn off your AV. So we need to store it in somewhere safe. Again, thank you so much for your help. I can not remember the commands but I saved some scripts for activating without Internet.

I think, all you wrote above refers to Retail Keys. MAK Keys don"t associate with PC hard, and if you, for instance, activate Office 2019 (2021) Pro Plus VL on Windows 10 Home or Pro with MAK, you should make activation backup, "cause after large OS update Office Installation ID could change and it will lose activation.

In your case, because the Outlook 2019 license does not appear, I think it is the following, if after you activated Outlook 2019 you installed and activated Office 2019 Pro Plus, the Office 2019 license deleted and replaced the Outlook one because the package of Office 2019 includes Outlook. If you delete Office or install and activate Outlook again, you will see that the opposite will happen to you, the Outlook license will appear and the Office license will not, we can only have an Office license installed on our computer. In my case, I don't use that type of tool to make backup copies of my Windows or Office activations. The only thing I do is keep the license in a safe place, either in my mail storage Drive or some other safe place. Some time ago I explained it and it is something that many users did not know or perhaps some still do not know that it is the following: 1 - When we activate any Microsoft product either Online, Web or Telephone, our computer is associated with that license for life as long as we do not change our HDD or SDD where we install and activate the product with said license, if we change our unit that license no longer serves us unless said license has the capacity available to activate a new device. 2 - After we activate a Microsoft product either by Web or by phone, it is no longer necessary to do it again this way if we reinstall or format our PC, if we have an Internet connection, simply enter the license and click on activate, which Product will be activated in a normal and genuine way, remember if it is the same HDD or SSD where we activated it in the beginning. 3 - When I activate Windows or Offine using the Web or by phone, the first time, the only thing I save is the license and the confirmation ID, which is what will make me activate the product if I don't have an Internet connection, if I have Internet connection I simply activate the product Online as if it were a new license since my PC is associated with that license for life always and when it does not change, I repeat the HDD or SSD where I install and activate the product the first time. In conclusion, do not worry about using said App to make a copy of the Windows and Office license files on your PC, just save the license and the confirmation ID which is what will make me activate the product if you do not have an Internet connection If you have an Internet connection, you can activate the product Online without any problem. I imagine that you know how to activate Windows and Office with your License code and the confirmation ID of the same when you do not have an Internet connection, if not, tell me to write the commands and give you an example. If you are a little more expert you can create a .bat file with your activation data that you will only have to double click on to execute the whole process.

Hi, Thanks for your contributions! I'm having trouble backing up my Office 2019 key when using MSBackup (v1.2.5). I activated Outlook 2019 and Office 2019 separately (Outlook was not included). When i backed up, MSBackup was just showing Windows and Office. I didn't see Outlook key. Sure! It does not mater, we can use Office key to restore Outlook as well. In this case, how can i do if i want to backup them separately? Sorry for my poor English. Thanks in advance!

You're welcome!

I just activated my Outlook. Still working now. Thanks!