By Information Technology Services
In the upcoming migration from Zimbra to Office 365, email messages with attachments greater than 25MB will not migrate. Both the email content as well as the attachment will not be moved to Office 365.
For emails that have attachments larger than 25MB, it is recommended that you download any attachments to your computer that you want to keep, as they will not migrate to Office 365. See the Knowledge Base article How to identify and download mail attachments larger than 25MB.
