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how many days it supposed to take when upgrading from Dynamic ax 2012 FP to R2?
Depending on the amount of customization in non-Microsoft layers (ISV to USR), I would say between a couple of days and a week, but no more than a week, really.
The upgrade itself doesn't take days, but you will need to setup and install the target and upgrade environment, as the RTM and R2 components can not co-exist on the same box/OS.
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