The ThirdPartyFileProvidersEnabled setting in OWA mailbox policies controls if Exchange Online mailboxes can access services like Drop and Dropbox for attachments. Office 365 tenants need to decide if they want to allow this kind of access. There’s both good and bad in the feature, but it’s easily turned off if you feel the need.
MailTips are a pretty useful way of drawing the attention of users to potential issues with email. Exchange Online supports several MailTips, but Outlook clients insist on supporting MailTips in different ways. It’s a small but irritating part of Exchange Online that could be done better.
The new version of OWA (sometimes called Outlook on the Web, or Outlook Web Access) is now generally available to all Office 365 tenants. Although the new OWA has some nice features, you might want to turn off the user choice (toggle) to move the new UI until you’ve had time to prepare the help desk, documentation, and that sort of thing.
The new version of OWA is maturing and new features are turning up on a weekly basis. You can now schedule a Teams meeting from OWA and the prospect of joyful animations hang in the air. But only for Office 365 users as there’s no sign that the new OWA will come to Exchange on-premises servers.
Including a company’s logo when listing or displaying email is another way to give users confidence that the email is in fact from that company. Business Indicators for Message Identification is a draft standard that might become generally used by all email clients. But for now. Microsoft has their own business profile “brand card” program, and that’s where OWA gets its logos.