Yes as far as I am aware Office 365 == Office 2013, one small difference may be that Office 2013 is also a standalone version ( I believe ) where as Office 365 is a cloud service.
Any MDB I open I get "Cant open a database from an older version" and am forced to migrate it over to atleast 2010 (I think) accdb
Perhaps if the (source) mdb is 2.0 or 97 vs any other version that used MDB as extension instead of accdb which may make a difference?
Most 'my' mdb's actually still source from 2.0, actual mdb solutions that already live for 20 years or more despite the (usual) resistance to the Access "crap" solutions that I make, I still chuckle when people go "*sigh* not that access shit again? Why is it still around?"
Or go "oh damn can never ever make June 1, must push it back to Aug 1... its Impossible!"
Me: Need it by June 1? Why not get it by May 1st? Wouldnt that be much better?
LOVE IT when you joke with IT people like that