Homepage "portal.office.com" / office apps client installation:
- Use the language from the user's profile for office installation instead of "English (United States) and/or
- add a language presetting option in admin area under "settings for software downloads"

I would love if Office.com could give me an overview of all relevant in Office 365. I am missing a link to Teams.

Please add a row / tile with the recent Teams notification from the Teams Activity tab.

We miss a tile for O365 groups on the home screen and app launcher. Users have no chance to go directly into a group, they must always first select an application and then go to the group view.

End user have alot of Employee Office 365 users having SharePoint License and using Office Desktop Applications. Admin wants to hide the Connected Services from Office Application. Admin still wants to keep the Internet connection active. Please add this feature

It's overly familiar and should at least be customizable.

I love the top/root web page for sharepoint, where i get an aggregated view of all my news.

Add a row on office.com to show the most recent sharepoint news. (perhaps with the possibility to individually filter out sharepoint sites)

When your O365 language settings are set to Hu-hu, the home page of Office365 shows "otthoni verzió" in the browser bar. It translates to "Home version". This is confusing for users that expect to be working on a business platform rather than on the consumer platform.
It should be changed to "Microsoft Office kezdőlap" or another meaningfull name.

I would like to be able to add attachments, while the case is working to send the necessary information from where I generate the request for service. Not at the first moment when the service request is generated.
In the same way when requesting telephone assistance, the call button is not activated if the telephone number contains letters in the case of telephone extensions.

Date format should be localised. Especially for subscription expiration information.

I don't like that the cursor doesn't show a blank space between itself and the last word when you press the space bar. You can't tell if you pressed the space bar or not. It's very confusing.

To get this working in MUI, additional column formatting is required and field customizer needs to be implemented in case the person type column allows multiple values. For a small clean feature which was available in classic UI, getting the customization done may not make sense.
Any idea, why this was taken away ?

We want to select specific users/groups to land on a specific SharePoint site when they log in to portal.office.com

Yes, this is technically possible. If I sign out of every single account I have. But it has taken me 30 minutes to not add a new account.

When opening documents from sp liba, you should be able to configure what is the default opening behaviour (read or edit). For example cover pages do not work when document is openened in edit mode.

I have multiple office keys listed under my account. It is very difficult to figure out which key goes to which machine when I have to reinstall it for any reason. It would be nice if I had the option to label them such as kids pc, office desktop, dads laptop, etc.

On the "My Account" page there are a list of products registered to the account, with "Install" links, but no way to know which ones have already been used. Would be great if there was a way to flag which products have been installed (and on which machines).

Since the only way to change an Office product key is to uninstall/reinstall, I've just had to uninstall/reinstall Office on 3 machines because our work account has a number of products and the users just selected the first key in the list when prompted at their first run.