Yahoo, AOL, and Gmail have implemented very strict Domain-based Message Authentication, Reporting & Conformance (DMARC) policies which may impact both sent and received mail from these services. If you are receiving mail from or sending mail to a Yahoo, AOL, or Gmail user and the 'From' IP address does not match that of the originating server, it is likely that your mail will be marked as un-deliverable somewhere along the mail flow.
One work-around is to not forward your Office 365 mail, but to use Mail Rules to forward your mail. The instructions in this article describe...
When you leave Harvard your Office 365 data is immediately deleted. This includes your email, calendar, contacts and OneDrive files (including documents you've shared). Documents stored in a Team Site (SharePoint) or Office365 Group will not be deleted. Prior to your departure from the University you should coordinate with your manager and provide copies of any and all business critical documents stored in your OneDrive or email. Your account is recoverable for a period no greater than 30 days from the date your affiliation with the University ends.
We do not recommend using the 'Harvard University' wireless network when accessing Office 365 email, calendar and other applications. Please make sure that you are using the 'Harvard Secure' wireless network. Outlook and other Office 365 applications may not work properly on the unsecured 'Harvard University' wireless network.
With mailboxes starting at 50GB, there's typically no more need for archiving email to local files to avoid going over your quota. If your archive files are connected to your Outlook profile and you'd like to add the content to your Office 365 Outlook mailbox, simply drag and drop messages and folders into your mailbox for online access from virtually anywhere!