We are running Exchange 2010 with 4 Servers (2x MBX, 2x H/C/T) and wanna migrate to Exchange 2013 in the near future.
One of our biggest pains is, that we have some very freaked-out linux-based MX which is pre-processing our mails before passing it to Exchange 2010.
So to get rid of the linux-based thingy and don't have the need to do things more than once I'm wondering, if it is possible to install an Exchange 2013 EDGE Server without having an Exchange 2013 role Server deployed anywhere in the network? If yes, we could start with that buddy and install the Exchange 2013 multi-role servers for migration at a later time.
Any help appreciated.