Please add Groups member support to Outlook.com accounts.
Currently Outlook.com accounts can only join Groups as Guests, not members.

Rules that has a problem indicated by an error should be selected after clicking ok on the popup error message

Add option to show spammers that user's email address is not valid.

Add the option to disable attachment preview on emails.

I know I can import a vcard but I'd love to be able to import any email signature to my contacts, including every detail that the signature contains. Would save me SO much time, not to mention ensure I actually save new contacts because it would be so easy.

In the current version, users will have to subscribe to each Public folders or sub folders separately. subfolders should get subscribed automatically when users subscribe to main folder

An option on right click to create a folder when highlighting multiple messages.

After the most recent update, when I click on the "+*** more" in the recipient details above a message with over 100 or so recipients, the upper part of the Outlook window goes a-wire. Essentially, the list of recipients expands but at the same time the top of the window gets mixed up as if it was expanded with the list. This mixed up window is only fixed by a restart of the Outlook application (hiding the recipients does not fix it). Seems to be some kind of bug.