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.

Get a new user role to read only the entire configuration of O365 admin portal.

Today you have to use the regkey DelegateWastebasketStyle to control the behaviour when deleting items in a shard mailbox.

This should have a PowerShell command, just like for sent items (set-mailbox shared@contoso.com -MessageCopyForSentAsEnabled $True)

One of the companys i manage Office365 for has, no AD which means no GPO's to use with regkeys, no consistensy in Office versions and thus this gets unmanageble.

Please add a way for me to control this centrally in Exchange Online.

Change or customize start page for all users on same time.

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.

The one-time-bypass feature is only available for Azure MFA with server/sdk implementations.

We use Azure MFA in a cloud-only setup. We don't have any server/sdk running. We would like to use the one-time-bypass feature.

Currently message trace timezone is set to UTC 0. This is really annoying. We should be able to change the timezone for this. There are posts on the forums going back to 2012 requesting this feature... please implement it.

It is very frustrating to see messages that have been lying there for weeks - who has time or remembers to go into the admin panel every day? Email notifications to the tenant owner should be standard on this. We get notified by email for everything else, why not messages?

SharePoint auto digest email for SharePoint News is rolling out, but only the users themselves can unsubscribe. This is extremely inconvenient, we have customers who have thousands of users with active SPO licenses awaiting training and adoption activities. Their first introduction to SPO will now be a pointless weekly spam message from their new system.
SharePoint News is not actively used in all tenants either, pushing the feature like this might be disruptive to adoption plans and governance established. Please provide admin control over this feature.

Please allow companies to disable the "Request to reset user's password" notification's if password resets are disabled in Office 365. We have internal processes in place for employee password resets and our Office 365 administrators are not typically involved.

The best solution would be a custom message that companies could display to employees who attempt to reset their passwords in O365 - this way the employee would be notified about the correct reset process.

On-premises Exchange had Email Address Policies which allowed administrators to define the email addresses (SMTP:alias@domain1.com,smtp:firstname@domain2.com) that would automatically be added to mailboxes.

Office 365 desperately needs this functionality so we don't have to resort to over complicated PowerShell scripts.

Proposal: Have the option through GUI to disable automapping for inboxes, and/or certain individuals that have permission to that inbox.

Explanation: When you assign permissions for someone to a particular inbox (including shared) it automatically adds the mailbox to their Outlook profile - this has caused us issues. While it can be disabled through PowerShell, it's very tedious to go through and remove each user and then add each user to every inbox with automapping disabled.

I'd like to run the exchange online powershell with a service principal. The use case is easy - we're running a background service setting some specific configuration on user mailboxes and don't want to use an admin account for that. It's sad this is not on the graph directly possible but at least make SPNs available for use with Exchange Powershell.

Recently the uservoice "SMTP Relay via Office 365 - Keep copy in Sent Items" was apparently implemented. As far as I can tell there is no way to turn this off. Please give those of us who don't want this an option to turn if off.

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.

Phishing emails are on the rise where Sender's name is used to lure recipients into trusting spam. We would like to prepend a disclaimer for emails originating outside the domain and add the sender's real email address to it. We have programmed the disclaimer but have been told by Microsoft tech. support that it is by design that sender's info is not available to be added to disclaimers.

Auto mapping to a shared mailbox should be allowed even if the user doesn't have Full permissions. Many times I have to manually add in Outlook and on a large organization of over 3000 users is time consuming.