im cam, a licenced diagnostic tech.
the computer has seen an issue with your awd system, and has disengaged it to prevent any damage.
this would be the same as your vehicle having an ABS light on, and it disables the abs until. serviced.
it should be safe to drive as the computer has gone into a fail safe as to not damage anything or put you into a dangerous driving condition.
you will just have to adjust your driving habit a little until it gets serviced.
if you feel safer, you can stop by one of the larger parts stores and they can do a scan for free and see what trouble code the system has stored
and see if it something to worry about or if it can wait till you get back to your dealer.
if the problem corrects itself, the vehicle will return to normal and it will just store a code.
i would still have it checked when you return
if you need any more assistance id be happy to help!
thanks and i appreciate positive ratings!