System diagnostic suddenly gives me: "Notifier protocol version is less than 3"

[SirTux]

Howto: Migrate To UDN Protocol Version 3

Howto: Migrate To Univention Directory Notifier (UDN) Protocol Version 3 With UCS 4.3-3 Erratum 423 Univention introduced the new UDN protocol v3. Environments which have been initially installed with UCS-4.3 or prior will still provide protocol version 2. You can upgrade you environment with the following steps. Step 1 Upgrade univention-directory-listener (on all roles) and univention-directory-notifier (Master and Backup) to at least UCS-4.3-3 Erratum 423. Be aware of the order of upgrad…