One of the features in Office apps that has come to the fore in recent years is the concept of @mentions – something that started in the early days of Twitter. The use of the @ before someone’s name lets you quickly tag them to a piece of content, and in some cases gives them a proactive notification that you’re trying to reach them.

Exactly how the notification occurs differs slightly depending on the medium – in Yammer, for example, starting to type someone’s name after an @ sign will give you a picker to choose which person you might want to tag; pressing TAB will accept the name at the top of the list, and cc: that person to the specific post you’re making, so they’ll be notified in Yammer and possibly by email too. If you know someone’s alias then you can quickly type @aliasTAB to tag and accept them. You can also use mentions in comments within Office documents.

The same behaviour is commonly available in Teams as well, though it may be more limited as to who you can mention – in the chat for a meeting or in a Teams channel, you’ll typically only be able to @mention the people who are taking part or who are already members of the team. Like other uses of the @mention idiom, tagging someone will insert their full Display Name, as defined in the Microsoft 365 environment (or the address book if you like) – which can make mentioning people in a chat feel a little directorial or formal, especially if the format of their display name is something like FamilyName, GivenName (DEPARTMENT).

In most uses of the mention, you can edit the full name of the person, though it’s not quite consistent how to do it – in Teams, for example, merely pressing backspace (after the display name has been resolved) will remove the last word … so if you want to tag a colleague and their display name is Jane Doh, then a quick tap will reduce that to simply Jane. If they were Doh, Jane (IT) then it’s a little more complex to lose the formality – holding CTRL+SHIFT while pressing the left arrow will select a word at a time, so you could ditch the last part of the name then simply CTRL+Left arrow would skip the middle part, then CTRL+SHIFT+Left arrow/Delete will remove the first part again.

Lesser platforms might allow a user to set a nickname that is used in place of their display name; that’s not (yet) an option in Teams etc, though in Outlook when you mention someone, you could insert a nickname in-between other names then remove the original ones, leaving only the short name you’ve added, but still hot-linked to their contact card etc. It’s a bit clumsy but might be preferable to calling them by their more formal name.

Entering a mention in Outlook also invokes the person by adding them to the To: line of the message and will show up in their default inbox view, indicating mails which mention them specifically.

You can’t sort by that special field, but you can filter the inbox to only show you the mails where you are being called out. Handy when people have a habit of assigning you tasks in an email, assuming that you’ll read it…

Just click the sort/filter option found to the top right of your Inbox or other folder, and choose Mentioned Mail to show only messages where you are mentioned.

As with all such features, it works for some people and work cultures/environments better than others. For some external best practice guidance, see here or here.