Recently I came across a problem that it was not possible to install File Server Resource Manager (FSRM) component on ar Read-only domain Controller (RODC).
After some research I found Microsoft KB article https://support.microsoft.com/en-us/kb/2973343, which said that it is not possible to do this. Reading the article more carefully I found that it wasn't possible to do this because setup cannot create a group called "Access-Denied Assistance Users", and that is understandable that it is not possible to create a group on a RODC.
But I didn't want to uninstall RODC, install FSRM and then install a RODC on a lot of servers, as this was a suggested workaround.
So after some days of testing I found that it was possible to create "Access-Denied Assistance Users" group on a writeable DC, let it replicate it to RODC and then it is possible to install FSRM on RODC.
You can create this group manually or install create the group by installing FSRM on writeable DC.
Keep in mind that it is not possible to uninstall FSRM from RODC when this group is in place.
Hope this helps!