Does this work?

\definefontfamily [msoffice] [rm] [Cambria]
\definefontfamily [msoffice] [mm] [Cambria Math]

\setupbodyfont [msoffice]

\starttext
\input knuth
\stoptext

Wolfgang
> Fabrice Couvreur <mailto:fabrice1.couvreur@gmail.com>
> 21. April 2018 um 11:41
> Hello,
> I got the cambria font and installed it :
> The text is in italic !
> Thanks
> Fabrice
> #########################################
> fab@debian:~$ mtxrun --script font --list "cambria*" --all
>
> resolvers       | trees | analyzing 'home:texmf'
> identifier           familyname    fontname            filename       
> subfont   instances
>
> cambria              cambria       cambria             cambria.ttc    1
> cambriabold          cambria       cambriabold         cambriab.ttf
> cambriabolditalic    cambria       cambriabolditalic   cambriaz.ttf
> cambriaitalic        cambria       cambriaitalic       cambriai.ttf
> cambriamath          cambriamath   cambriamath         cambria.ttc    2
> cambriamathnormal    cambriamath   cambriamath         cambria.ttc    2
> cambriamathregular   cambriamath   cambriamath         cambria.ttc    2
> cambrianormal        cambria       cambriaitalic       cambriai.ttf
> cambriaregular       cambria       cambria             cambria.ttc    1
> fab@debian:~$
>
> ##########################################
> \switchtobodyfont[cambria]
> \starttext
> \input knuth
> \stoptext
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