Email attachments

The largest email message you could previously send or receive in Office 365 was 25 MB. While 25 MB is more than enough for the majority of email, and we wouldn't advocate regularly sending larger emails, there are times when you need to send a large file as an attachment. We’re pleased to announce that Microsoft have now increased the allowed maximum message size to 150 MB.

The default maximum message size for Office 365 mailboxes is going to still remain at 25 MB, however if you'd like that increasing for your users the please get in touch.