Security exchange not updating
By default, all new mail-enabled security groups require that all senders be authenticated.
This prevents external senders from sending messages to mail-enabled security groups.
To configure a mail-enabled security group to accept messages from all senders, you must modify the message delivery restriction settings for that group.
This example creates a security group with an alias fsadmin and the name File Server Managers.
Use this section to view or change the email addresses associated with the group.
This includes the group’s primary SMTP addresses and any associated proxy addresses.
If you select the Owner approval is required check box, the group owner or owners receive an email requesting approval to join the group.
You can remove a member by selecting a user in the member list and then clicking Remove .
Use this section to specify whether owner approval is required for users to join the group.