Unable to turn on DKIM with SmarterMail

Applicable to:

#PPPM-5812 "DKIM settings could not be managed if SmarterMail 14.x or earlier was installed on the server."
Fixed in:
- Plesk Onyx 17.5.3 23 March 2017 (Windows)
- Plesk Onyx 17.5 Release 20 April 2017

Please consider updating your server:

SmarterMail 14.x or older is installed on the server
Enabling the option DKIM spam protection at Tools & settings > Mail server settings returns the following error:

PLESK_ERROR: sfdk_server_wide_sign_failed
Enabling Use DKIM spam protection system to sign outgoing email messages at Domains > example.com > Mail settings returns the following error:

PLESK_ERROR: SOAP ERROR: GenerateDKIMCert(server.example.com, 1024, default) failed: Error code 0x803d0013. Error message: The body of the received message contained a fault. Fault reason: Unable to handle request. The action 'http://tempuri.org/GenerateDKIMCert' was not recognized. at (WebService::Error::checkResult line 103) at generateDKIMKeyPair(default, 1024)(SmarterMail::Common::Domain::generateDKIMKeyPair line 208) at execute console command --generate-domain-dkim-key-pair(vconsoleapp::start line 122) at execute mailmng.exe --generate-domain-dkim-key-pair "--domain-name=
Corresponding DNS records for DKIM are not created under Domains > example.com > DNS settings .
The error appears during Plesk upgrade to 17.0 version:

This is Plesk bug with ID #PPPM-5812 which has been fixed in Plesk Onyx 17.5.