Is PGP Desktop or Symantec Encryption Desktop supported on Microsoft Office 365?
Microsoft Office 365 Cloud Server is not supported by Symantec Encryption Desktop prior to version 10.3.1.
The support for Office 365 has been added with the 10.3.1 version of Symantec Encryption Desktop. Please upgrade the PGP Desktop to a version not less than 10.3.1. Please note that the email client must still be locally installed, Symantec Encryption Desktop does not support the web-based Outlook 365 client.
Compatible Email Client Software
Symantec Encryption Desktop for Windows will, in many cases, work with Internet-standards-based email clients other than those listed here. Symantec Corporation, however, does not support the use of other clients. Symantec Encryption Desktop for Windows has been tested with the following email clients as of version 10.3.1:
■ Microsoft Outlook 2013 (32- and 64-bit)/Exchange Server 2010 (on-premise only)
■ Microsoft Outlook 2013 (32- and 64-bit)/Office 365 Cloud Server
■ Microsoft Outlook 2010 (32- and 64-bit)/Exchange Server 2010 (on-premise only)
■ Microsoft Outlook 2010 (32- and 64-bit)/Office 365 Cloud Server
■ Microsoft Outlook 2007 SP2 (Outlook 12)/Exchange Server 2007 SP2
■ Microsoft Outlook 2007 SP2 (Outlook 12)/Office 365 Cloud Server
■ Microsoft Outlook 2003 SP3/Exchange Server 2003 SP3
■ Microsoft Windows Mail 6.0.600.16386
■ Microsoft Outlook Express 6 SP1
■ Microsoft Windows Live Mail
■ Mozilla Thunderbird 3.0
■ Lotus Notes/Domino Server 8.5.1 FP2
■ Lotus Notes/Domino Server 8.5.2
■ Lotus Notes/Domino Server 8.5.3