Exchange 2010 transfer of the license and uninstall old Exchange

Question

Hello everyone,
I had some problems with my old Exchange 2010 as it was freezing from time to time. I decided to install a new Exchang 2010 server. I transferred mailboxes, MX record stays the same and I routed all e-mails to the new server now. I disconnected other server
from the network to test is everything working fine and so far so good.
My bigger concerns are following now:
a) how to transfer license as I wanna use the same license key which old server uses.
b) How to Uninstall old Exchange 2010 server.
In regards to license transfer I don't want to get to the point where I am going to get message that I used the same license key on another server. Do I have to deactivate license on the old server? How do I do that. Maybe uninstallation of it will send
a signal to Microsoft that license is gone. Has anyone come across this kind of issue? So what do you think should I uninstall old server first before I enter this license?
In regards to my second question which is related to the first one. How do I properly remove old Exchange 2010 server. I found some instructions that I should just go to "programs and features" and uninstall it this way or run a setup from CD.
Other instructions says that I should uninstall database over power shell and uninstall public folders etc. I would like to do it as clean as possible as I don't want my new exchange or any of DCs to look for missing Exchange later. Which option properly uninstalls
Exchange 2010 from my domain and from AD. I wanted to add that my Exchange2010 are on Windows Server 2008 R2.
I just wanted to add that I phoned Microsoft to ask about it but they said that I have to pay for support otherwise they can't help me. What would you do first? license or uinstallation of old Exchange 2010? I still have over 100 days of trial on new build
server.

Answer 1

Hi,
1. Arbitration mailbox is used to store organization-wide data such as administrator audit logs, metadata for eDiscovery searches, and Unified Messaging data. To avoid more issues, we recommend to move the mailboxes. And here is a reference about how to
move arbitration mailboxes:
http://social.technet.microsoft.com/wiki/contents/articles/3912.exchange-2010-how-to-delete-the-first-database-and-move-the-system-mailboxes.aspx
2. If the public folders won’t be used in the new environment, we don’t need to move them.
3. For the issue whether the license can be used twice, we recommend you to contact with Microsoft Customer Service to confirm.
4. By default, when Exchange 2010 is installed, OAB is created in the default internal Web site in Internet Information Services (IIS).
For more information:
http://technet.microsoft.com/en-us/library/aa996917(v=exchg.141).aspx
If you have any question, please feel free to let me know.
Thanks,
Angela Shi