xfermailbox in unified murder config

[b800000 at pilot.itsc.cuhk.edu.hk]

Hi, is there any success in transferring mailbox to a different server  
in unified murder config ?

I got error : "Could not move mailbox: user.abc, LOCALCREATE failed"
user.abc is in server1, I tried to xfer it to server2.
I'm wondering the LOCALCREATE user.abc in server2 failed because of  
mailbox already exists....

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