I am in the process of migrating a single Exchange 2013 install (CAS+MBX co-located) to two separate installs, a CAS and MBX server. Mail has been flowing in via my new CAS for around a week now, I had altered DNS and IPs for this. Yesterday I migrated the last mailboxes off the old server and then un-installed Exchange, which appeared to happen cleanly and without issue. I am now facing an issue where my CAS server will not receive emails, reporting "4.7.0 Temporary server error. Please try again later. PRX4" when I try to send an email. If I send emails directly to the MBX server, they arrive without issue. This was working before I removed the old Exchange server. Any ideas? I'm really stuck here.

• Edited by James Harling Wednesday, October 01, 2014 6:24 AM

Hi ,

As per my knowledge This error is purely related to dns settings issue .

Please check the following links . Definitely it will help you out .

http://www.techieshelp.com/exchange-2013-451-4-7-0-temporary-server-error-please-try-again-later-prx5/

http://sleekexchange.net/?p=272

Regards

S.Nithyanandham

Hello,

Please use the following test tool to check the root cause:

https://testconnectivity.microsoft.com/

Thanks,

 

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Hi,

 

Is there any update?

 

Thanks,

 

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