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can we do on-site archiving of mails of Exchange Online services.
if yes then can you please give some guidance- how can we do it and what are the requirements for the same.
It’s not available to perform on-site achieving of emails as the Personal Archive of Exchange Online services. To archiving emails without using Personal Archive, you may export the files in a .pst via Outlook and configure an inbox rule to delivers to the local pst file. Then it will stored per your needs.
I would like to follow up with the question you posted previously. Does the reply above answer your question?