PGP-Error with Horde

[kolabadmin]

Am Mittwoch, 11. Februar 2009 schrieb Gunnar Wrobel:
> Quoting Paul <kolabadmin at cit.notraces.net>:
> > Am Montag, 9. Februar 2009 schrieb Gunnar Wrobel:
> >> Quoting Paul <kolabadmin at cit.notraces.net>:
> >> > Hi all,
> >
> > But the next problem appeared: if i try to upload a public key i get the
> > message:
> >
> > "This person already has a pgpPublicKey entry in the address book"
> >
> > How else can i assign a key to a person?
>
> As the error message tells you that you already uploaded a key you
> need to remove the key of that person before uploading a new one. You
> should see a list of available keys and this list should offer you the
> possibility to delete the key.

this sounds logical, but unfortunately there are no keys at all. I don't see a 
list and never uploaded any key for now.

How are thes keys managed in horde? Where are they stored? This would be a 
helpfull information. 

cheers
paul