Hi

We have Office365 and are using DirSync. We've also set up a collection of distribution groups.

I've managed to configure moderation etc by changing the attributes in AD of the groups as required. We've also set msExchRequireAuthToSendTo=TRUE to ensure that external users cannot send email to these groups.

However, in some circumstances I need to ensure that only the members of the distribution group can send email to it... not anyone within my organisation. Is this possible? Which attribute do we modify to implement this?

I haven't been able to find a solution to this so far so any ideas would be appreciated.

Shane

Set-DistributionGroup -Identity "The Group" -AcceptMessagesOnlyFromDLMembers "The Group"

The documentation says that this attribute is synchronized, so you should run this command on-premises.

Hi Shane,

Have you tried the suggestion above? How about the result ?

Best regards,