Solution : https://service.sap.com/sap/support/notes/442722 (SAP Service marketplace login required)
Key words : 
menu path tools -> administration -> user maintenance -> users, sem-srm require e-mail access, tools -> business communication -> communication -> sapconnect, sem component business information collection, higher cd documentation sem-bcs, 10 cd including sap sem frontend, component bc-upg-addon, type tcp/ip connection, valid e-mail address, initial menu system-wide
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