From our experience these migration processes do usually turn out to be much more complicated than most businesses anticipate. In many instances we've had companies approach us claiming to have an IT estate of less than 100 applications which need transferring. After a full audit, we've quickly found there to be literally thousands of installed applications that the organisation didn't even know existed.
We don't need to migrate them all, but before anything can be deleted businesses need to decide how their removal would impact other applications and other aspects of the business.
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