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Old 12-03-2019, 06:10 AM
Lewis-H Lewis-H is offline Windows 10 Office 2019
Join Date: Nov 2019
Posts: 5
Lewis-H is on a distinguished road

There are many possible causes for Office 365 activation errors, for example:

Office 365 was not installed on a clean machine; an older version of Microsoft Office was installed previously.
There is an issue connecting to the Internet, the Microsoft Office 365 portal Sign in to your account or the ADFS server ( in your LAN or DMZ.
The user you are trying to sign-in with does not have a valid Office 365 subscription assigned.
These are but a few possible causes.
Hope you find it helpful!
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