Are BES Service Packs cumulative?

I recently inherited an IT shop that has been neglected.  I am trying to play catch up, and one item I want to update is the Blackberry Enterprise Sever.  It is currently running with Hot Fix 1!  I am wondering if I have to go through and install all the previous service packs or just the most recent and the most recent fixes after that service pack.  
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Yup you can go straight to 4.1.6 and then apply 4.1.6MR2 after that, althrough you should always take a backup first :)


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I would also make sure you can call RIM for support, since there are sometimes issues.

I hope this helps !
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