Open the Send Connector tab under Server Management > Hub Transport option
Right-click in the empty space and select New Send Connector
Ensure intended use field is set to custom.
Enter Vautastic in Name field, then click Next
Click Add in the address space window
In the address field, enter {domainprefix}.vaultastic.com
Select Route mail through the following smart hosts. Click Add..
Select FQDN. Enter o365-v4.vaultastic.com. Click OK, then Next.
Leave smart host authentication settings as None. Click Next.
Choose the Hub Transport Server’s that apply. Click Next.
Preview Configuration Summary. On the New Connector page, review the configuration summary for the connector.
If you want to modify the settings, click Back.
To create the Send connector by using the settings in the configuration summary, click New.
On the Completion page, review the following, and then click Finish to close the wizard:
A status Completed indicates that the wizard completed the task successfully.
A status Failed indicates that the task wasn’t completed successfully. If the task fails, review the summary for an explanation, and then click Back to make any configuration changes.