Modifying safe senders list on Office 365 via powershell
There are times I have needed to adjust the safe senders list of a user on Office 365/Microsoft 365. If you are the administrator of the tenant, simply fire up Powershell, then:
$Credentials = Get-Credential
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $Credentials -Authentication Basic -AllowRedirection
Import-PSSession $Session -DisableNameChecking
Get-Mailbox -ResultSize Unlimited | Set-MailboxJunkEmailConfiguration -TrustedSendersAndDomains "techsupport@office365.com"
First 3 lines gets you connected to Office 365, when prompted enter admin email/password
Then last item gets list of mailboxes and adds techsupport@office365.com to safe senders list. If you need to just change it for 1 user, you can do something like:
Get-Mailbox -Identity user@domain.com | Set-MailboxJunkEmailConfiguration -TrustedSendersAndDomains "techsupport@office365.com"
This will do the trick
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