Trying to downgrade Microsoft Office 2013 Std to Microsoft Office 2013 Home & Business.Everything is working fine as the all included package of Home  & Business but the issue is <g class="gr_ gr_260 gr-alert gr_spell ContextualSpelling" data-gr-id="260" id="260">its</g> accepting the product key of Home and business but not making product activated and Still getting error that your office will expire in few days.......please suggest me for the same.......

Hi,

Since your issue is related to Office license issue, I suggest you contact the customer service, explain the scenario to them and ask if they can provide some help:

http://support.microsoft.com/gp/customer-service-phone-numbers/en-us

Regards,

George Zhao
TechNet Community Support