why do you use port 8443?

on all my oes-server with imamager i use only https://ip_address/nps and this work fine!

cg

I've just installed a fresh 3.2.6p3 instance on SLES15SP5. Had to manually install the 32bit package of libstdc++, but both installation itself and runtime behaviour didn't show any issues. Maybe a cert thing? What do you get on something like

openssl s_client -showcerts -connect xx.xx.xx.xx:8443

Please also note that i don't have eDir on this box, so this might be a factor. I roughly remember an issue with eDir 9.2.7 breaking iMan 3.2.6p2, but i think this was on RHEL and was fixed with 3.2.6p3 anyway.

Thank you all!  I opened a tciket with OpenText and this is the solution:

Manager will fail to install when eDirectory 9.2.7 is installed on the same server
iManager 3.2.6.2 installs an older version of netiq-openssl than eDirectory 9.2.7
iManager 3.2.6.2 fails to install when netiq-openssl is newer than the version it is installling
Cause
eDirectory installs netiq-openssl version 1.0.2zf-182 which is newer than the version being installed by iManager.
Resolution
Manually remove or downgrade the netiq-openssl package prior to installing iManager
Steps:
Stop eDirectory:  ndsmanage stopall
Remove the netiq-openssl rpm installed by eDirectory 9.2.7:  rpm -e --nodeps netiq-openssl
Install iManager (stand alone or from the IDM iso)
Stop iManager:  systemctl stop novell-tomcat9-service.service  or rcnovell-tomcat9 stop
Upgrade the netiq-openssl package to the version which is located in the eDirectory 9.2.7 setup directory:  rpm -Uhv netiq-openssl-1.0.2zg.x86_64.rpm
Start eDirectory:  ndsmanage startall
Start iManager: systemctl start novell-tomcat9-service.service  or rcnovell-tomcat9 start

Ah. In the OP you didn't mention that eDir is running on the affected box. Thanks for sharing the solution.