"IBM Traveler servers must support SSL/TLS and have a valid certificate. For security reasons, the app will not connect to a server with a self-signed, expired or otherwise untrusted certificate, nor will it connect to a server configured for HTTP rather than HTTPS."

Taken from - https://www-304.ibm.com/support/knowledgecenter/SSYRPW_9.0.1/iOSVerseNeedtoKNow.dita

Damn, I never realized this restriction existed!

I have other clients who use the 'normal' (original) Traveler client and have self-signed certificates.

I expect they are going to lose connectivity if they ever upgrade then?

If they upgrade the client from the older Traveler client to the new Verse client they may get lucky and things will continue to work. However, if they were to uninstall/reinstall or do a new install on another device then it will not work.

Note Android devices with Verse do not require SSL enabled only Apple devices.

Also with apple devices using Verse you need to watch that the apple certificate does not expire either

by keeping up to date with the Traveler Fix packs.

I used a Comodo SSL certificate which does not have a root Cert installed on Android Devices so they have to accept the certificate each time

it is renewed, wheres as the apple devices with ios 9 have it pre installed so no errors.