user directory - migration

[ofir gutmacher]

hi,

I am about to migrate my user directory from bitbucket to Admin.atlassian

my bitbucket directory which i epxorted had 136 records. out of this, 35 are not on plan (so i dont care about them). 
now focusing on the 101 users which are indeed on plan,
i am missing in my Atlassian admin 5 of these users. 

what will happen to these users following the migration of the user directory ? 
will they be able to login to my bitbucket ?