Office 365 SMTP authentication failing, even with correct account information

I can't get these powershell permissions to take as I don't have the right role to execute cmdlet Get-TransportConfig. This is super frustrating as the SMTP server fails the authentication of the user every time. Opening a support ticket with MSFT as we've had no email on Wordpress now for four weeks. Ugh.

I don't believe that i post solution thatch work onmicrosoft.com only accept solution should be slc /scannowYou have to enable Authenticated SMTP then wait 3 minutes.Open the Microsoft 365 admin center and go to Users > Active users.

Select the user, and in the flyout that appears, click Mail.

In the Email apps section, click Manage email apps.

Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled.

When you're finished, click Save changes.

I don't believe that i post solution thatch work onmicrosoft.com only accept solution should be slc /scannowYou have to enable Authenticated SMTP then wait 3 minutes.Open the Microsoft 365 admin center and go to Users > Active users.

Select the user, and in the flyout that appears, click Mail.

In the Email apps section, click Manage email apps.

Verify the Authenticated SMTP setting: unchecked = disabled, checked = enabled.

When you're finished, click Save changes.

This solve my problem..

When my admin entered the screen, this option was already checked in my account, so he deselected, saved, closed the screen (I don't know if it is necessary), entered again, selected again and saved.

I waited 5 minutes, and updated the configuration in gmail.

And work

@all i think this ist the solution:

I had the same Problems, old offic365 accounts work, new accounts did not work. After searching for 5 hours i get a solution:

In the old accounts SmtpClientAuthenticationDisabled is false by default on online Exchange, in the new accounts it is True by default.

I had to set it to false by exchange online powershell and also hat do go to e-mail-apps and set the hook to authenticated smtp

after that it worked. Here you can read what is to do by exchange powershell:

https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/authenticated-client-smtp-submission

Steps in Powershell:

$UserCredential = Get-Credential

$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection

Import-PSSession $Session -DisableNameChecking

Take a look if it is True: Get-TransportConfig  (if there is True set to false)

Set-TransportConfig -SmtpClientAuthenticationDisabled $false

Take a look again if it works: Get-TransportConfig

Remove-PSSession $Session

In Admin Center --> acitve Users --> click the user --> email-apps --> click the hook --> authenticated smtp

With this combination it worked for me. Hope this can help you all

This was exactly what I was looking for, it was hard to find. I would like to add that in my case, I had to not only do this but also do it at the user account explicitly because it had already been created with the previous global defaults. Thanks a lot.

Everything was checked but had to go open the window and then click save changes without changing anything and now SMTP works.