OK I think I have fixed this myself. To disable signature checking on the update file you need to set the hudson.model.DownloadService.signatureCheck variable to false. I did this through a groovy script added to the %JENKINS_HOME%\init.groovy.d directory. The script I used contained the following:
import jenkins.model.* try { hudson.model.DownloadService.signatureCheck=false; println(“Disabled signature checking for update service.”); } catch (MissingPropertyException e) { println(“No signature check disable property found!”); } -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com<mailto:jenkinsci-users+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/57d040ca.c2111c0a.8061b.4bf3SMTPIN_ADDED_MISSING%40gmr-mx.google.com<https://groups.google.com/d/msgid/jenkinsci-users/57d040ca.c2111c0a.8061b.4bf3SMTPIN_ADDED_MISSING%40gmr-mx.google.com?utm_medium=email&utm_source=footer>. For more options, visit https://groups.google.com/d/optout. This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error. QinetiQ may monitor email traffic data and also the content of email for the purposes of security. QinetiQ Limited (Registered in England & Wales: Company Number: 3796233) Registered office: Cody Technology Park, Ively Road, Farnborough, Hampshire, GU14 0LX http://www.qinetiq.com. -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/57e25004.06e11c0a.40e7d.342cSMTPIN_ADDED_MISSING%40gmr-mx.google.com. For more options, visit https://groups.google.com/d/optout.