Situation: Company A and Company B get merged becoming Company C.  A/B both 
have exchange worlds. We create a C AD domain, install exchange 2010, and put 
contacts/mailbox links in A/B/C. Inbound now flows to C and then to either A or 
B as needed. Trusts exist between the three AD domains.

Questions:

1)      We plan to move mailboxes between A/B to C

a.       Can we still get access to mailboxes that have been shared across a 
forest? (secretary moved, attorney hasn’t been, or visa versa). Can the 
secretary still see the attorney’s mailbox?

b.      Can the primary AD account be in one domain and the mailbox in another 
when in the existing AD domain exchange systems exists (or is that part of what 
the mailbox links do?)?

c.       Do the rights move with the mailbox (User X has rights to inbox of Y, 
Y moves, does X still have access)?



2)      Public folders

a.       Is there are good way to migrate public folders across Ex2010 forests 
(I know there were solutions with 2003->2010 – {IORepl }– but these have been 
removed by MS?).

                                                               i.      CodeTwo 
has one – has anyone used this product to migrate public folders across forests?

b.      Can user X with mailbox in Forest A access a public folder in ex2010 
Forest C?  (This is a big one).

                                                               i.      As I 
migrate users – how do the public folders still get accessed by thoses that 
have moved (or not moved yet)?

                                                             ii.      Do rights 
across forests work with public folders?





Are there any other products/tools/proceedures/blogs/kb that I should be 
looking at to resolve these issues?  I am looking and have not found a good 
solution yet.



Thanks

Steven Stringham









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