Environment:
GroupWise 2014
GroupWise 18

Situation:
The GroupWise gwadminservice will not load, status shows failed.

Will see the following in the gwadmin-service.log:
2022-05-03 16:07:40 GwAdminServiceListener [INFO] Starting admin service listener: 10.1.1.1:9710=>DOM1(/media/nss/MTA/Apps/dom1)
2022-05-03 16:07:41 GwAdminService [WARN] Error starting listener
com.novell.gw.api.common.GwRuntimeException: Missing SSL certificate for admin service listener: 10.1.1.1:9710=>DOM1(/media/nss/MTA/Apps/dom1)
       at com.novell.gw.api.main.GwAdminServiceListener.buildSslContextFactory(GwAdminServiceListener.java:361)
       at com.novell.gw.api.main.GwAdminServiceListener.init(GwAdminServiceListener.java:326)
       at com.novell.gw.api.main.GwAdminServiceListener.start(GwAdminServiceListener.java:505)
       at com.novell.gw.api.main.GwAdminService.start(GwAdminService.java:1139)
       at com.novell.gw.api.main.GwAdminService.main(GwAdminService.java:277)
2022-05-03 16:07:41 GwAdminService [INFO] No listeners running. Waiting for IPC commands

Cause:
The certificate for the admin service has been deleted or expired.

Resolution:
In a putty session or terminal window on the GroupWise server, change to the /opt/novell/groupwise/admin folder.
Run the following command: gwdminutil ca -g -d <primary domain path> -f
This will generate a new certificate for the Admin Service only.
To confirm it is there, run: run gwdminutil -d <primary domain path> -l

Run: rcgrpwise start 
And the gwadminservice should now load properly.

Access support article here