Thank you, that was quite quick.
Well, you can set values there, how else could you update appointments - but I understand that there is probably no way to find out which calendar app made the entry in order to know whether they have to be corrected - or is there?
As stated before, it if was an empty field (like null) or if a distinct value like 0 was used and
1=tentative (thank you for the correct term)
2=approved
3=rejected
this could be recognized and there could be an (advanced) option in DAVx5 about how to handle that.
On the other hand if it is set to 0 and
0=tentative (thank you for the correct term)
1=approved
2=rejected
DAVx5 may not be able to distinguish an App that uses the 0 value correctly and apps like Business Calendar 2 and Samsung Calendar that have this issue.
And yes, I understand and agree that this should be fixed by the calendar app, but as this seems to be an quite widespread issue it would be nice to add a fix if it is similar easy as thought of in my post. I doubt that Samsung will fix it, as it has been around at least 1.5 years.