Exchange 2013 / 2007

Would there be any disruption in the ActiveSync and OWA services? if I deploy new exchange 2013 server in a VM with Windows 2012 and just keep it active for a week before actual migration or before applying any certificate services or before changing any routing and DNS.

Our emails comes from inbound securence filter. I hope if the public and private IP forwarding does not know about new Exchange the old exchange should continue to work, but I skeptic after seeing article about Exchange 2013 SSL automatically trying to proxy services after it was introduce to existing environment
pchettriIT DirectorAsked:
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Amit KumarCommented:
if you don't change your public IP and DNS record to Exchange 2013, so there will not be any issue while introducing new servers. You can apply certificates as well on Exchange 2013 it will not effect anything.

Just to remember don't point internal/external DNS record for OWA/Autodiscover/ActiveSync/OA to Exchange 2013 until you are ready to start actual migration.

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pchettriIT DirectorAuthor Commented:
Thanks for your quick reply...

I am planning to change external and internal DNS only after introducing new certificate and after adding _autodiscover SRV record to resolve unregistered name. Once I know, it works fine with test user and internal DNS then I will add record to external  DNS for_autodiscover SRV, and add forwarding on firewall.
Amit KumarCommented:
Just remember minimum supported requirement.

Supported with the following minimum versions of Exchange:

1.Update Rollup 10 for Exchange 2007 Service Pack 3 (SP3) on all Exchange 2007 servers in the organization, including Edge Transport servers.

Before migration Exchange 2013 should be installed with mentioned CU or later version:

2. Exchange 2013 Cumulative Update 2 (CU2) or later on all Exchange 2013 servers in the organization.
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