Difference between M (Read entry helps) and R (Read) in P_ORGIN

Hello Gurus,

I have question regarding the authorization level in P_ORGIN. The enduser has access to the Read 'R' access but When

he tries to assign (PERNR xxx) to an order he does not see the user.

SU53 says that authorization level 'M' (Read with entry help) is missing. Currently it is setted as R,

please let me know if the end user can be able to see with R only as it is also read access.

Regard's