One of my client has recently upgrade to Sage 50 Cloud. I cannot seem to enable the Office 365 integration. It requires activation, the only instructions I can find are here. But this I think assumes Office 365 was purchased with Sage, the client already has an existing Office 365 account I need to integrate it with. https://ask.sage.co.uk/scripts/ask.cfg/php.exe/enduser/std_adp.php?p_faqid=38378&Link=From

Any ideas how to enable this?

Thanks for your help, Craig