TerryZolinskiThe lack of clarity over whether something is domain or forrest dependant is something I have to deal with on a day to day basis, yes we should not have set up our Forrest as we did but it was done in 2000 and that was different times with different versions of Exchange and business needs, now we have to live with it as the pain of moving would be immense (don't get me satrted on O365 problems we run in to). We have a root domain and 7 geo-based sub domains, I have no control over the root (Forrest) or other subdomains so it is important to me that the differences between where stuff is configured is explicitly and clearly stated such as if it has to be that the FFL is set 2012 or the DFL is 2012 or later. Whether yo need to be an Enterprise Admin or domain Admin is also important, many articles say Enterprise Admin but if you are only running stuff against a domain it is only Domain Admin you need, or say Domain admin but they actually need Enterprise Admin again these terms seem to be interchangable to some writers.
If you are in the happy place of only having a single domain/forrest over which you have total control lucky you as this stuff will be unimportant.