Move/Copy E-Mails from mailboxes to Office365 Group conversations
We would like to copy E-Mails to an Office365 group to have a history of group related E-Mails which happend before group creation.
Forwarding the E-Mails to the groups e-mail adress is working but you are losing the timestamp of the original mail.
Shiv Gupta commented
Have a look here: https://www.nucleustechnologies.com/exchange-migration/ . It is a very proficient Exchange migrator software, which can help you to migrate public folder from one Exchange or Office 365 account to another.
These 39 votes should definitely be summed up with the 500+ of this uservoice thread : https://office365.uservoice.com/forums/286611-office-365-groups/suggestions/15043524--drag-and-drop-email-messages-into-group-inbox-wi
...meaning this is an absolute need that should not have been overlooked in the first place !
Don DeCarlo commented