In Outlook desktop or Microsoft Edge Legacy browser the add-in crashes when attaching local files. Outlook displays a message "Sorry, we had to restart because this add-in wasn't responding" and the add-in is reloaded. This usually happens if the user spends more than 5 seconds in the dialog to select local files.
of these crashes, but the problem might not be completely solved for some users, especially those with slower devices. As a workaround the administrator of the PC can set a registry flag, which will provide more resources to the add-in and Outlook will not terminate it.ersion 10.4.1 reduces the frequency
The registry key is a 32-bit DWORD value, called AlertInterval located under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\WEF or HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\WEF. The default value is 5 and gives the add-in 5 seconds to respond. Set the value to a reasonably high number, such as 30, restart Outlook and observe if the add-in crashes. To remove the limit completely, set the value to 0. Note that this setting applies to all office add-ins, not just Syncplicity Outlook Add-in for Office 365.