This setting controls the minimum protocol version that the server will allow the client to use.
Normally this option should not be set as the automatic negotiation phase in the SMB protocol takes care of choosing the appropriate protocol unless you have legacy clients which are SMB1 capable only.
See server max protocol for a full list of available protocols.
|Registry Path||Software\Policies\Samba\smb_conf\server min protocol|
|Value Name||server min protocol|