This is in the midst of migrating current MS Exchange 2003 server to online Office365. Almost all the 80 mailboxes are configured to sync, and it is just the matter of time to cutover. However, we have 5 copier machines need to send soft docs via email. I am thinking of setting a smtp relay to point to the office365 smtp server for mail sending. How should I setup the smtp relay on MS Windows 2003 Server?
I heard that office365 smtp has to be configured with port 587 in TLS, so, how should I configured it in IIS SMTP service? How about changes on the copiers? Are they still point to this smtp relay with port 25?
Thanks in advance!