So I am provisioning Security Groups to FIM based on a custom attribute, there are some other groups also located in the FIM portal. I am trying to create a Set for the groups based on the custom attribute, but I am not finding it my list of available attributes to make a criteria.

I probly am missing something simple. The attribute is already binded to the group and they are provisioning FIM into the portal.

1. Make sure that this new attribute is in the Filter configuration as attribute allowed to be used in filters. 

2. If it is not visible in drop-down you can always just provision a group and set this directly as XPath - either through script or through "advanced view". I know not a perfect solution but works 100% time :) 

When you create a custom attribute, you need to make it indexed, if it is a string. Check the attribute and if it is not indexed, you may have to delete it from schema and recreate it.

Trying to delete it now... but unfortunately, it wont delete, I went through all the sync rules, objects and MPRs that had it in there, I also deleted the binding, which was no problem, but it still refuses to delete the object..

I am at a loss where to find it.

Thanks, I had done all those, in the advanced filter it gave an error, but I found that it has to be indexed in other blogs as well, now I have to delete it.