That FolderParent number matches the number on the account entry where the groupware folders are kept.
BUT, that variable you had us search on is NOT there.
I just checked my kmailrc file that is on another non-kubuntu (it's gentoo), non-enterprise (as in standard KDE distribution) kmail install that DOES work and that entry is not there either.
I actually loaded my kmailrc file into an editor and I did find this entry:
[IMAP Resource] lders=false Enabled= true FolderParent= 910815151
HideGroupwareFo
TheIMAPResource
TheIMAPResource
That FolderParent number matches the number on the account entry where the groupware folders are kept.
BUT, that variable you had us search on is NOT there.
I just checked my kmailrc file that is on another non-kubuntu (it's gentoo), non-enterprise (as in standard KDE distribution) kmail install that DOES work and that entry is not there either.