Issue
Double clicking a document using DSOLClient does not checkout document.
Reason
Opening a file item by a double click action no longer checks out the file by default using the Outlook Client. This behavior was changed and was necessary to address other issues.
This is working as designed due to Outlook / MAPI limitations.
Because of the ambiguity inherent in the Outlook open call, OLClient cannot assume one mode (read-only) over the other (write-enabled). Without an explicit indication, OLClient must leave the file unlocked. Unfortunately, this is not something that the Client alone can overcome in a straightforward way. It is a problem of Outlook (or MAPI).
Solution
As a workaround to avoid any check-in conflict, if there is a chance that multiple users edit a file, we provide the Check Out button on the Tool bar.
Note: By default, the DocuShare Outlook Client Check Out button may be hidden. To view the button select the drop down arrow on the navigation bar of Outlook to view/expand hidden buttons.
Warning: If multiple users edit the file by double-clicking the current version instead of using the checkout button they would have the last checked in edits while the previous version would contain the previously checked in edits. They would need to combine those edits if someone accidentally used the double click method instead of the check out icon.