Today to display a separator page between print jobs that include the user information a few conditions have to be met, and those rely on the on-premises, synchronized ID of the user.
We need this to work with native AAD IDs as the on-premises dependency is not a given and B2B invited guest users have no such relationship but may need to use the same printers. Further I would expect that printer native UP support would also have no knowledge of domain information.
Therefore a separator page setting needs to be inserted by the UP service. It could be a sperate print job with the same printer settings as the job following the separator. Of course configurable on the print queue in UP, as specialized printers do not like separator pages.
