Step 1 Open the Exchange Admin Center. . Select Admin -> Exchange in the top right corner. Do the following > Deliver the message to the Hosted Quarantine. - Click on the domain you wish to manage. "Off" means auto forward is disabled and "On" means auto forward is enabled. guava. yourdomain. To create a group only on Office 365 and allow internal users on hybrid server to send mail. Create a new rule. This will open the Allowed and blocked senders and domains screen. Select Platform as Windows 10 and later and Profile Type as Settings catalog. . . LoginAsk is here to help you access O365 Unblock User quickly and handle each specific case you encounter.