IBM Verse on Premises, enabling encrypted and signed mail. You may need to do something if you have your ID in the mailfile
For Verse on Premises in order to write and read signed and/or encrypted mail is enough to set up an ID Vault on the Domino server and add the user’s ID to that.
I found that if you previously used iNotes for mail and have added your ID to the mailfile, then you will get an error while reading or creating a signed/encrypted mail; the error will say that your ID is not in the vault, even if actually the ID is there.
In order to fix that, you need to access your mail with iNotes, go in Preferences – > Security and click on the button Sync with Vault
Once done that, everything works