According to the SDK documentation, SaveItemConfiguration should not be possible to use in Smart Client (“This method is only implemented in the Management Client, Event Server and standalone SDK (not in Smart Client).”). However, it works in our Smart Client plugin in versions 2019 R3 and later. Are there any limitations here, or does the documentation refer to an even earlier version? And, if so, when was it implemented?
Hi Kajsa.
We have overlooked the comment in the documentation. 
SaveItemConfiguration has been supported in Smart Client since 2018 R3. Only limitation is that it cannot be used in Offline (Smart Client Player) mode.
I’ll make sure we get the documentation updated.
/Peter
Great, thanks for the clarification!