I suppose it's at least problematic according to Microsoft's own guidelines: https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general

I suppose it's at least problematic according to Microsoft's own guidelines: https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general.aspx https://www.microsoft.com/en-us/legal/intellectualproperty/t... Gleaning from that I'd say that it would be alright to name a product "Analytics Panel for Excel" but with "Excel Panel" they might run into problems. At the very least they probably should mention Microsoft trademark ownership somewhere on their site.