So I’ve been doing this for a while now but never thought to mention it here until today when I had a geographically dispersed 2008 Domain and some AD issues between sites to check out. We all remember the REPLMON tool in 2003 and how awesome it was/is and if you’ve gone to use it on 2008 you’ll notice it’s gone! Well here is how to get it back.
Basically you just install the 2003 AD support tools. You can download them from here http://go.microsoft.com/fwlink/?LinkId=100114 just download the two files, the msi and cab and then run the msi ignoring the error messages and the replmon tool will be in C:\Program Files (x86)\Support Tools
Hope this helps. Cheers
PS this works with all versions of 2008 including R2, etc.