Source Domains a mix of 2003 & 2008R2 > Target 2012 R2
Migrate Domains A-E > Domain FEveryone trusts each other (SidHistory enabled)
The following is just one example of the way groups have been setup and nested(User and resource Forest)Source Domain AGG-DomainA (Global security Group)
(User and resource Forest)Source Domain BGG-DomainB (Global security Group)
(User and resource Forest)Source Domain CGG-DomainC (Global security Group)
(User and resource Forest)Source Domain DGG-DomainD (Global security Group)
(Resource Forest for above forests)Source Domain E DL-DomainE (Domain Local Security Group) With all GG-Domain (A-D) nested within. This is just one of a number of groups that are DLs in this forest that were created to give access to data. 100's of DLs with nested groups from the other Domains (GG-DomainA-D). In turn these DLs (DL-DomainE) have been assigned permissions on the Data that resides in this Forest.
Target Forest FMigrate Forests A-E here.
Which is the best way to tackle (migrate) such a scenario?