I made a black hole distribution group on my Exchange 2010 and when adding addresses it gives me the error: The proxy address "smtp:email@example.com" is already being used by "Whatever.COM/EXEMPLOYEE/Sam Smith". Please choose another proxy address.
I have a single domain and Sam Smith does have that one address just as everyone has their own address (firstname.lastname@example.org. I have added other exemployee users without error but have a few like the one above that give me the error above. I'm still a bit green with Exchange so any help would be appreciated.
In a Cross Forest, the steps to migrate users are quite complicated and even in the official articles of Technet there is no clear recommendation on which approach to take .. From an experience, I mention and simplify which way to go and how to use …
Fix RPC Server is unavailable Error in Exchange 2013, 2010, 2007, and 2003 Server. Different reason can such as network connectivity issue, name resolution issue, firewall, registry corruption that lead to RPC Server Unavailable error.
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