How well does cross domain authentication work across a Trust? If you have a Forest trust, pretty good. Just make sure you have your UPN routing setup on the trust configuration. And across a domain trust? Not so well, and
You have a Directory or E-Mail migrations to do? Who should you trust as your vendor? Coherence has been doing full time e-mail and directory migrations since 2004. That pretty much all we do. And we do it quite well.
While QMM (Quest Migration Manager) can handle plenty of very complex migration scenarios in terms of AD attributes synchronization tasks, sometimes even such variety is not enough. This is where ARSS comes to help.
Just came across this simple diagram of MS Exchange client-server protocols and figured I’d share it here. These days there is a bit of a confusion on where each protocol used in Exchange so I decided to try and fill this gap. I will also put it in the context of QMM migrations and describe how it evolved over the years plus point out a difference in permissions assignment model.