Set Delivery Restrictions

You can set delivery restrictions on mailboxes.
  1. Right-click a user.
  2. On the shortcut menu, click the Properties tab.
  3. On the Exchange General tab, click Delivery Restrictions.
  4. Under Outgoing message size, click No limit, or click Maximum KB.
  5. Under Incoming message size click No limit, or click Maximum KB.
  6. Set message restrictions:
  7. Click OK to save settings.