How to turn off Junkmail in office 365
To apply these settings to your entire organization in Office 365 you will need to login to office365 via PowerShell.
Launch PowerShell and enter the following to login:
$UserCredential = Get-Credential (This will prompt your for username and password)
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection
If you get an error when Importing PSSession on Office365
Type: Set-ExecutionPolicy RemoteSigned
Once that is set:
Type Get-Mailbox to see if you see all the mailboxes, if you do you are now ready to turn off Junkmail.
Type Get-Mailbox | Set-MailboxJunkEmailConfiguration –Enabled $False
When this function is complete, you will return to the Powershell prompt. (Please be patient it could take a little time.)