Here is a DFS-R Health Check utility i wrote, so i though i would post a quick note about it.
http://networkadminkb.com/Utilities/Descriptions/DFS-R%20Health%20Check.aspx
If you have a large DFS-R implementation to support, you know trying to find a free utility that can quickly generate a single health report on many servers at once is nearly impossible. (i couldn't find a single free utility). Microsoft has their Health Reporting tool that can be ran from the command line and GUI, but it will only report on one replication group at a time. If you have 100s of these, that's 100s of reports to generate and review.
So i decided to write a quick utility that can monitor all of our 50+ DFS-R servers/100s of replication groups and create a single report. I can check that report daily and take action to get more information if something is abnormal, otherwise i can ignore it. I also wrote it so it will discover new replication groups/servers automatically, so there is not much to configure. As long as you give it the the central hub in a DFS-R replication topology, it will discover all partners from that hub. If you have mulitple hubs, specify all of the hubs in a single text file.
The first time i ran it, it mmediately told me about 3 problems i didn't know i had, because i hadn't checked on those replication groups in months. Luckily, they were just minor errors, but being proactive is what this utiltiy is to be used for. If it reports a problem, you still need to review the issue, and come up with a solution on your own...its a free utility after all.
Its simple and easy to use. Give it a try. Comments are welcome.