When using LDAP as backend for SOGo. Mail lists in Global Address book are not displayed, even if enabledService=displayedInGlobalAddressbook has been set for the list. Issue is in SOGoUserSources with displayName = "Global Address Book". The filter is set to filter = "objectClass=mailUser AND accountStatus=active AND enabledService=mail AND enabledService=sogo AND enabledService=displayedInGlobalAddressBook";
Solution is to remove objectClass filter and enabledService=sogo. filter = "accountStatus=active AND enabledService=mail AND enabledService=displayedInGlobalAddressBook";
Or you can keep enabledService=sogo and add it to each maillist.
Tested the solution with removing objectClass filter and enabledService=sogo and can now see the mailinglists in Global Address Book.