Sorry, another account from your organization is already signed in on this computer
Symptoms
Whenever you try to login to an Office365 account in Microsoft Office, the wizard tells you that you have already been logged in using another account.
Workaround
Delete Registry Entries
Open a registry editor and navigate to the following key
Office 2013
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\Identity\Identities
Office 2016
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity\Identities
Delete any sub-key that contains an account from your organization.
Delete Credential Manager Entries
Open the credential manager from the control panel and delete every entries that are from you company.
Bonus : If it still tells you the same message when you create a new Outlook Profile.
Well, every solution I’ve seen so far tells me to reinstall Microsoft Office.Moreover, the registry key has been recreate despite the fact that all has been cleaned up properly.
This is what worked for me :
- Go to Control Panel -> Mail -> Show Profiles
- Create a New Profile
- Once the new profile wizard start, hit Cancel.
- When the system asks you if you want to create the profile even if the configuration has not been done, click Yes.
- Select “Prompt for a User Profile” to be Used in the profile management panel
- Close the panel
- Start outlook and select the empty profile
- Configure it
At that point, the registry is showing two different accounts in registry.