Sheet Access report in User Management does not include unlicensed users not included in the account
I am trying to get the list of all users that have a sheet shared with them (whether they are licensed users or not and whether they are included in the account or not). I used to be able to get this information from the User Management - More Actions - Sheet Access. However, this report now only seems to include the Licensed Users or Unlicensed Users included in our account. It does not seem to include any users that are not included in the account anymore.
Has there been a recent change to the set up of this report or am I doing something wrong?
Is there an alternative easy way to obtain this information?
Thanks in advance.