For IIS 8.0 related issues on R12.5 our PSM mentions its supported from R12.5 CR03 onwards but actually both CR03 & CR04 binaries won't work and give you below error when configuring the Webagent.
Solution for this is to use the NIN provided for R12.5 IIS 8 Webagent, which is also mentioned in the PSM:
Same thing follows for R12 SP3 as well, we also do have a NIN for IIS 8.0 Webserver on R12 SP3 Webagent as per the Roadmap guide.
The code change was done only in R12.51 CR03 onwards for IIS 8 Webagents, same has been updated recently on the R12.51 PSM recently.
Hope it helps.
Admin UI hangs on submitting tasks when creating Agents/Policies pointing to SiteMinder/adminui/server/default/conf/bootstrap/vfs.xml with below error in the boot.log:
03:22:24,566 DEBUG [AbstractDeploymentContext] Added component VFSCache$realCache#1 to file:/C:/CA/SiteMinder/adminui/server/default/conf/bootstrap/vfs.xml
Below tech-note mentions one of the proposed solutions for this error: