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Mark Moore's avatar
Mark Moore
Iron Contributor
Jan 28, 2019

Issue with O365 account on a machine with 2 accounts

Hi, I am having some issues that I think might be of my own making, with the O365 Accounts associated with my Office install.  I work from home and am using my own PC for both work and my own stuff....
Matt_Philipenko's avatar
Matt_Philipenko
Iron Contributor
Feb 06, 2019

Hey Mark,

 

The flow you're seeing is "by design" Office uses the SignedInADUser for Windows to activate/authenticate. When Office is launched on a clean machine we use the Signed in AD User. If you want to change this behavior you will break Single Sign On but you WILL be able to enter specific credentials.  Your Office apps will use the cached UPN going forward.

 

Please follow the steps on my blog post here to clean u the activation https://blogs.technet.microsoft.com/odsupport/2015/05/01/how-to-reset-an-office-365-install-to-the-initial-activationinstall-state/ 

 

Once cleaned up crate the NoDomainUser registry key to force Office to prompt for sign in rather than using the AD User signed into Windows.

  1. Start Registry Editor.
  2. Navigate to the following registry subkey:
    Office 2016
    HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity
    Office 2013
    HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\Identity
  3. Right-click the entry, and then select New.
  4. Add a new DWORD value to the registry called NoDomainUser, and then set it to a value of 1.

 

Please reply with any questions or concerns.

  • Mark Moore's avatar
    Mark Moore
    Iron Contributor
    Feb 06, 2019

    Hi Thanks for your response,  I actually manged to fix this myself in a very easy way I should have thought of first.  I simply signed out of the office app with my Windows signed in ID, which left just my work ID listed in the Office apps and this has persisted.  This is fine for me because I almost exclusively use the O365 apps on my work machine for work anyway, so have no need to switch between accounts.

     

    I think my problem was as you had stated  i.e 

    1. I have a personal Windows PC which I have had for a long time.
    2. I installed a licened copy of Office pro plus on this machine
    3. The first time I fired it up it asked me for my work credentials to activate the software
    4. But it had already signed me in as a "user" with my Windows acount as well, so I had 2 emails registered with the software and it always defaulted to my Windows Login account (with the option to "switch accounts"), which caused these strange issues
    5. After simply "signing out" from the account page of the office app from my WIndows account, it now starts up with me Work email as my Office user as this is now the ONLY account on my Office apps

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