On the Admin service page, there are a few options you can perform.
Suspend
This option will suspend all domain(s) under this hosting package.
Special Note
Once the domain is suspended, the domain will no longer resolve the DNS queries, Email forwarding, etc...
Unsuspend
This option will resume all domain(s) under this hosting package.
Terminate
This option will remove all domain(s) under this hosting package from your WHMCS system and DirectAdmin servers.
Migrate
This option will allow you to migrate all domain(s) under this hosting package onto another DirectAdmin server.
Sync Masked Redirection (new in v1.1)
This option will allow you to sync the service's domains masked redirection. This is particularly useful after you had migrated domains over to another DirectAdmin server but the nameservers (or A record poining to the new DirectAdmin) aren't up to date yet. By running this function, the module will trigger each domain's remote connector to generate the masked redirection again.