We're looking to get our environment ready for Ex2010 and will be upgrading our BES from 5.0.1 MR2 to 5.0 SP3 and whatever the latest MR is.
I see mention you need to uninstall MDS Integration Services before installing SP3. I can't see a service called "MDS Integration service" on the BES but there is one called BlackBerry "MDS Connection Service" - is this the same thing.
Also whats the process for upgrading to SP3 like, pretty straightforward? I remember 4 >5 was a bit of a nightmare.