When AdminUI starts up, a directory "iam" and a file "workflow.log" are created under the working directory where the startup shell script "run.sh" was executed.
This can be observed in AdminUI 12.5x.
The behaviors are as designed by IAM framework of AdminUI.
For "workflow.log" file, you can pass the value into LogDir into "ra.xml" and it will create any location. See the Workaround.
For “iam” folder, you can’t make it configurable. But, these folder should not create any problem for SiteMinder.
LogDir property resides in "ra.xml" under <siteminder>/adminui/server/default/deploy/iam_siteminder.ear/workflow.rar/META-INF
Example: set LogDir to "/tmp".
This will result in that /tmp/workflow.log is created.