Sugessions to Migrate all the mail boxes from Exchange 2007 to Exchange 2010 OR Exchange 2013


We have VMware virtual infrastructure. Currently we have Exchange 2007 mail server in our network. We wanted to migrate our exchange  server from 2007 to 2010.The migration engineer had built the Exchange server 2010 on a Windows 2012 and he migrated a couple of mailboxes and tested and I was told only the SSL certificate was pending  that required to be applied. By then the IT Services Company went into administration and it is been a year since the Exchange 2010 server was built.

This exchange 2010 server was powered on,  since one year and three days before I have shut down the server.
Now, I am thinking of moving to Exchange2013 rather that to migrating all the mail box from Exchange 2007 to 2010. Please suggest

1)Is it a good idea to remove exchange 2010 that is installed on Windows 2012 server and  install Exchange 2013.If so please post me some tutorials to completely remove exchange.

2) If this is not a good idea and if I have to build a new 2012 server and freshly install Exchange 2013, please let me know.

Thanks any suggestions much appreciated.
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Simon Butler (Sembee)ConsultantCommented:
You need to power on that Exchange server. If there are mailboxes on it then move them off.
Then simply use add/remove programs to uninstall Exchange. The uninstaller will do the rest, including tell you if anything is wrong.

Once Exchange is correctly removed, drop the server completely. A fresh build should be used for the new server.

Up to you whether you want to go to Exchange 2010 or 2013. Exchange 2016 is due shortly as well, therefore if you don't own the licences for Exchange 2013 you may want to just migrate to Exchange 2010 instead, then purchase 2016 when it is released.
I would still remove the old server if you were going to do that though - bring up a fresh installation of Exchange instead.

Will SzymkowskiSenior Solution ArchitectCommented:
Personally, I would be going to Exchange 2013. Exchange 2016 (even after release) would not be a good idea to move right away because almost always you have bugs that need to be worked out and this can be painful dealing with things like this in a production environment.

If you don't have Exchagne 2013 CALS, you could just wait for Exchange 2016 to come out and then purchase the 2016 CALS which are then downgradeable to Exchange 2013.

Then when you are ready you can migrate to Exchange 2016, because you will already have the CALS.

As for the Exchange 2010 server you want to remove this before you introduce any other Exchange servers. If you decided to go to Exchange 2013 your minium requirements for Exchange 2007 is SP3 RU10.

I would also recommend that you use Exchange Deployment Assistant which is a good high level guide/check list.

Vincent BurtonCommented:
I would like to confirm if the issue has been resolved as per above suggestions  which looks good to accomplish this task?

If not yet, then please have a look on below given informative post which might be helps you to accomplish this task.

Its totally depends on you whether you want to move to Exchange 2010 or Exchange 2013. However, everyone preferred upgraded version.

Step-by-Step Exchange 2007 to 2013 Migration:

Modify or Remove Exchange 2010:

Exchange 2007 to Exchange 2010:

Hope it helps you!

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