Exchange 2013 CU3 update

I have a 2 node DAG in an Exchange 2013 environment.  I am running Windows 2012.  I have just updated to CU3 on both Exchange Servers and while I can send mail I cannot receive mail.  Servers trying to send mail to this environment receive Service is not available.  All services are running.
cdebloisAsked:
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Andy MConnect With a Mentor Internal Systems ManagerCommented:
Not sure on the exact cause but in your place I would check the following:

1. Try a telnet from one of the exchange servers to the other.
2. Try a telnet from another local server to the exchange server.
3. Check the receive connectors - ensure they are setup correctly
4. Check event logs for errors.

I know it's a cliché but have you tried rebooting both exchange servers?
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Jorge OcampoCommented:
What Ports do you have open?
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cdebloisAuthor Commented:
I am currently re-seeding one of the DB's so I have to wait on the reboot.  I will be doing that first chance I get.  I have double checked the receive connector and all looks right.  I haven't made any changes to the firewall so the ports haven't changed.  This environment has been up and running with no issues until the update was installed.  When I attempt to telnet it looks like it will open but then I get connection lost.
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Andy MInternal Systems ManagerCommented:
Hmmm, I assume the general network connection between the servers is fine (ping test). I think first port of call is certainly a reboot of the servers at the earliest opportunity.
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cdebloisAuthor Commented:
Yes network connection is fine.  As soon as I can reboot both I will post an update.  Thank you :)
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cdebloisAuthor Commented:
Thanks so much for the reply.  The reboot seems to have fixed it :)
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