Hi Bostjan,
What is your backend Exchange Version?
These settings are saved on the server side, hence you don't have to use ADM per client to configure this (Its similar to configure OOO for mailboxes)
You can use EMS powershell to configure it.
This example makes the following configuration changes to the junk email rule for the user named Michele Martin:
-
Adds contoso.com
and fabrikam.com
as trusted domains without affecting any existing trusted domain entries.
-
Adds jane@fourthcoffee.com
as a blocked sender without affecting any existing blocked sender entries.
Set-MailboxJunkEmailConfiguration "Michele Martin" -TrustedSendersAndDomains @{Add="contoso.com","fabrikam.com"} -BlockedSendersAndDomains @{Add="jane@fourthcoffee.com"}
#This conbination should allow you to set it for entire Org
Get-MailboxJunkEmailConfiguration -Identity * | Set-MailboxJunkEmailConfiguration
You need to run this regularly to configure this on new mailboxes, as it will not auto configure on new mailboxes.
References:
Set-MailboxJunkEmailConfiguration
https://technet.microsoft.com/en-us/library/dd979780(v=exchg.150).aspx
Get-MailboxJunkEmailConfiguration
https://technet.microsoft.com/en-us/library/dd979784(v=exchg.150).aspx
Initial mailbox junk email configuration (Sending a welcome email, should initialize it as per my understanding, still check the link for the solution)
http://forums.msexchange.org/m_1800563463/tm.h