Hello,
Environment is one Remote Desktop Server Session Host on 2012 r2 fully updated with a fully updated standard 2012 r2 domain controller. I have four users on Office 365 E3 Plan.
The problem I am having - the activation is not persisting across the user either logging off or opening different Office applications. When I open the Office application I get this error - http://i.imgur.com/3fLdmr7.png . If I click OK, it prompts me to Activate and then sign in, which I do. This then lets me use Word/Excel etc. If I then close Word, and re-open it I go straight back to the error message.
I followed the instructions here http://technet.microsoft.com/en-us/library/dn782858(v=office.15).aspx and subseqently here http://technet.microsoft.com/en-us/library/43419d08-4517-45e8-8cb6-ccec1b8b85bf(v=office.15)#BKMK_ConfigureCmd to install.
As per the guidance here http://technet.microsoft.com/en-us/library/dn782859(v=office.15).aspx when I go to File > Account I can see that it looks like infographic A so that is correct. The SharedComputerLicensing value is in the registry and set to 1. In my %localappdata%\Microsoft\Office\15.0\Licensing I have four files {GUID}.authString, {GUID}.authString.txt.previous, {GUID}.signingCert, {GUID}.signingCert.txt.previous
I have a tried a full removal and re-install of Office and this made no difference.