Can I integrate FYI into Xplan for financial planning correspondence?

We have no immediate plans, but we are open to integrating with every major player in the profession. 

Please note that all emails to and from clients via Outlook are automatically imported into FYI.

In terms of other correspondence, such as letters, SOA etc, there are easy methods of importing into FYI including a Windows "watch folder" for each user and also using drag and drop. Refer to Using OneDrive FYI - My Imports to Automatically Import to your In Tray and Drag and Drop.