Implement a feature that enables users to access a link on the non-default browser from the link on an email in Outlook on the web; for example by prefixing “microsoft-edge” at the top of the URL.

We cannot use the Accept/Decline button of the transport rule on the mobile browsers.
So, please enable these buttons in Outlook on the web on mobile browsers ASAP.

Dark-Mode theme
I repeat Dark-Mode theme
Please and thank you

I love the addition of My Day in Outlook online where you can interact with tasks and calendars without switching tabs. I would really like to click a similar tab for OneDrive that would let me see files in my drive with the option of dragging attachments from email to folder directly (or vice versa) through the side pane, or even select attachments and right click them with the option to "Attach to New Email". It would really streamline cloud file management while staying in your inbox.

Previously, the resource mailbox’s language overrides the language set within the user mailbox; however, you have to set the language for the resource mailbox separately now.
So, please let us see the resource mailbox in the language of the user mailbox as it used to be.

It would be great if you could add a feature to check which Office client (such as Office 2010 or Office 2013) is used to connect to the Office 365 services.

Previously, there was an instruction about resetting autocomplete in Outlook on the web at the following URL: http://support.microsoft.com/kb/287623/ja
However, the content changed to the article for Excel built-in function. We would like to request for publishing the latest public facing information about resetting autocomplete in Outlook on the web.

Help me to have "custom" labels for phones in Office 365 Outlook.

You can select the Working elsewhere option for Show as in Ootw or Outlook client. So, please allow us to select the option in iOS or Android mobiles, too.

It would be great that we could have a toggle to switch to the previous version of Ootw.

Add a feature that can view the preview screen by clicking the Print button when printing only the message body in OWA. To see the message preview, we use IE, but it shows everything in the screen as well as the message body itself. We need this feature in OWA because we would like to modify its size and the number of copies before printing, so that we can print the desired area in the combination of OWA and IE.

I'd like to be able to add a subfolder from a shared mailbox to my favorite collection in OWA. We have inbox rules sorting incoming email into subfolders in shared mailboxes. Only being able to add the inbox-folder of a shared mailbox to your favorite collection is a bummer.

If there is an object which has the same properties such as mail address or display name with an existing object, those objects are automatically linked, but we would like to disable the auto linking feature and let those objects to be recognized as different ones.

Enough is enough! Please give us an option to return to the classic!

We are sharing one calendar with multiple users and let them edit it concurrently, but it takes a few days for edited items to be reflected in the calendar. So, we would like you to implement a feature that can increase the number of sessions to avoid the delay.

Need a setting that prohibits opening attachments from Outlook client or Outlook on the web with Office products in local PC.

When using the new Outlook on the web, I would like to open an app in a new window when clicking the app from the app launcher. Previously it was automatically opening in a different window when using classic Ootw, but the new Ootw shows apps in different tabs. It is more convenient
to use different windows as I can check emails and use other apps at the same time.