Hello.

I'm trying to migrate from 2011 sbs to 2012 r2 essentials. According to documentation there should be an installation option during new 2012 r2 server installation called "migration mode" (new server or migration mode), but in my case i don't have such option. There is no such window at all.

Any clues?

Can you share a link to that documentation, as I do not believe that is accurate for 2012 R2.

ok, now i see.

https://technet.microsoft.com/en-us/library/jj721754.aspx

This document is all about migration from 2011 sbs to 2012 essentials (not r2).

So there is no documentation on migration process from 2011 sbs to 2012 r2 essentials.

The only way of doing this is to install 2012 r2 and transfer roles manually (AD migration).

I believe there is no migration automatization for 2012 r2.. too sad.

https://technet.microsoft.com/en-us/library/dn408633.aspx

Docs on migration process from 2011 (2012) to 2012 r2 essentials.

Migration to 2012 R2 essentials is same as that to a Standard Server.

1- Install the server

2- Join it to the domain

3- Transfer the FSMO roles