I am trying to enable "Trust email from my contacts", but I get an error that reads, "Junk email validation error. Value: user@contoso.com" with just an OK button and it doesn't enable. I soon learned that it has to do with a 1024 contact limit. We have over 7000 contacts. I then learned I can use powershell. I have powershell 3 on Windows 7 64 bit. When I authenticate and run the command, "Set-Mailbox user@contoso.com -MaxSafeSenders 7250" I get this error: "
A parameter cannot be found that matches parameter name 'MaxSafeSenders'.
+ CategoryInfo : InvalidArgument: (:) [Set-Mailbox], ParameterBindingException
+ FullyQualifiedErrorId : NamedParameterNotFound,Set-Mailbox
+ PSComputerName : podxxxxxx.outlook.com
I have seen this question posted numerous times before but none seem to answer it and accept that this feature cannot be enabled. Anyone with a clue.