I would like to be able to edit the standard page (accessdenied.aspx) when a user don't have the rights to access a SharePoint Site !

Set DKIM key size to 2048 by default

As many audits consider 1024 bit too low for today.

Currently it is not possible to switch the AD tenant in portal.office.com like you can in portal.azure.com.
Without that is is not possible to Access the O365 Admin Panel as an B2B guest account that has Global Admin or EXO/SPO permissions.
Login always takes me to my home tenant with my mailbox.

It is also not possible to do this by PowerShell.

So please make it possible to use portal.office.com Admin Section as an B2B guest otherwise it makes no sense that I can for example assign Exchange Admin permissions to an B2B user.

This would make it easier for an administrator to know it the mobile is in the hand of a legitimate user before approval.

Provide centralized usage reports for entire SharePoint Online tenant such as page views, user sessions, usage per site collection, etc. Individual site collection reports are ok but are not centralized.

Please provide read only access feature for O365 Admin center

RSS feed for Service Health Dashboard is not available anymore.
Now User can get service health notifications from the Office 365 Admin mobile app.

But the previous RSS feed was also fruitful service since User can download it by Outlook Client.
Re-release RSS feed for Service Health Dashboard will be an ideal feature for many Users.

This feedback is based on a customer voice from support SR.

Allow renaming of initial domain. Would save a large amount of resources if the company did not have to setup and migrate to a new tenant organisation if the company name changed, eg for a merger/split.

Allow the portal log-in landing page to be changed for the entire organization as the administrator. For example, instead of being directed to Outlook, the user is directed to the share point site. I realize users can do this for themselves, but I'd like the ability to do it for them as the administrator.

We currently have 3 different domains using 365 business premium and would like the bills emailed to us every month rather then having to log in and download the PDF statements/Invoices.

If its possible to add this feature it would be much appreciated

We need a better way other than PAL for teachers to access student data in Office 365. The Share option is not a viable option when most schools have over 100 parents and needs to scale to 100,000s. If there was a parent SKU in which permissions could then be assigned to the student content, it would allow us as partners to develop solutions. We've been asking for 2 and half years and keep hearing, that's good feedback. Cheers

In large environments (mine is 80,000 users!) it is necessary to have a the various admin roles split across several teams and personnel. To control this easier it would be great if I could use security groups from AD sync'd to AAD then assign the admin role(s) to the group instead of individually to users.

I would like to have a Read only version of the tenant admin. This is great to give to security to do there audits as well as anyone doing there checks on settings for audit purposes.
Buy having this you dont need to give full tenant R/W access to staff that dont really need it or know what they are really doing. All the Get commands work but not the set commands..

Ability for app to be globally removed from the app launcher - as opposed to telling 50,000+ to unpin it themselves.

There should be option to provide external user access to shared mailbox.
Currently only internal user with license have access to shared mailbox. But there should be option such that external users can be added as member of shared mailbox created inside the organization since shared mailbox have feasibility to co-ordinate with external domain.

Please publish the Exchange Online PowerShell Module used for MFA to the PowerShell Gallery (www.powershellgallery.com) to allow for easier installation.

The clickOnce installer is a bit of a non-standard installation for most people used to working with standard PowerShell modules.

Please see:
https://www.reddit.com/r/PowerShell/comments/6auqzl/connectexopssession_userprincipalname_username/?st=j2quh9hf&sh=54fa86ff

Highly needed Email Signature management option with signature directly under the latest email reply or forward