This is something that I came across which I wanted to share in case anyone else is doing a fresh install of 2025 and is still asked to support deprecated features.
For enabling the "Act As" function in the Classic side of OAS, I noticed in this version that a directory was missing:
$DOMAIN_HOME/bidata/components/OBIPS
This is the directory where one creates the "custommessages" directory to hold the LogonParamSQLTemplate.xml file used to add this feature.
You can simply add the OBIPS directory yourself to enable this feature. On Linux:
cd $DOMAIN_HOME/bidata/components/
mkdir ./OBIPS/custommessages -p
cd OBIPS/custommessages
vi LogonParamSQLTemplate.xml
Then follow the instructions as normal.
Regards,
Chad