ARDC-CL-000090 - Adobe Reader DC must disable access to Webmail.
When Webmail is disabled the user cannot configure a webmail account to send an open PDF document as an attachment. Users should have the ability to send documents as Microsoft Outlook attachments. The difference is that Outlook must be configured by the administrator on the local machine.
Configure the following registry value: Note: The Key Name 'cWebmailProfiles' is not created by default in the Adobe Reader DC install and must be created. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Policies\Adobe\Acrobat Reader\2015\FeatureLockDown\cWebmailProfiles Value Name: bDisableWebmail Type: REG_DWORD Value: 1