Managed domains configuration (iOS device policy)
With the Managed domains configuration you define managed domains for iPhones and iPads.
Enter email domains managed by your organization. Email messages from an address that doesn’t match one of the configured domains are highlighted as out-of-domain in the Mail app.
Files downloaded from one of the configured domains are treated as managed documents. If you activate the Allow documents to be shared only within managed apps/accounts restriction, these documents can only be opened by managed apps.
For information on managed apps, see Managed apps for iPhones and iPads.
If a managed web domain entry contains a port number, only addresses that specify that port number will be considered managed. Otherwise, only the standard ports will be considered managed (port 80 for http and 443 for https).