I have a client, with Business Premium licensing which currently has Office 365 ProPlus installed on a number of PCs. It has recently come to light that they have a volume license key for Office Professional Plus 2013 and so would like to use this instead to lower their 365 licensing down to Business Essentials.
Is there a way i can apply the Office Professional Plus 2013 key to the Office 365 ProPlus or is there a way i can alter the Office installation to allow this?
The client is reasonably large and spread over a large winding building so any suggestion to avoid having to visit PCs individually would be really helpful.
Thanks,