I am trying to allow internal users to share files from their office 365 groups externally. They receive the error "Administrative policies don't allow sharing with people outside your organization."
I have checked all the settings and everything points to a user's ability to share externally. There are some sharepoint online site collections with less sharing permissions and office 365 groups cannot invite guest users.
My question is,how do I enable external sharing as the default for all office 365 groups?Can I enable sharing externally without enabling guest access?
I realise I can enable external sharing without guest access, by powershell script (-SharingCapability ExternalUserSharingOnly), but in this world of office 365 groups popping up everywhere I don't have the time to do this manually for every group!