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Question
Thursday, August 10, 2017 1:49 PM
Hi
We want to run the hybrid configuration wizard as part of migrating our 2010 exchange environment to exchange online
Our external FQDN is "mail.domain.com" and is pointing to our CAS server (no other roles)
During the wizard run, it asks us for "Organization FQDN". Can someone tell me what goes here exactly and what ports are required for it?
- Does this external FQDN need to allow incoming port 443 traffic ONLY from office 365 servers?
OR
- Does this external FQDN need to allow incoming BOTH ports 443 & 25 from office 3565 servers? If so, does it mean that we need to also install HUB role on the CAS server?
I appreciate a real good answer.
Thank you
All replies (7)
Friday, August 11, 2017 6:01 AM ✅Answered | 1 vote
Hi,
The Organization FQDN is the FQDN of your local Exchange environment, it should be resolved to the public IP address and enables mails to be routed to the on-premises Exchange. On this address, the Exchange server is listening on port 25 and 443 (EWS, OWA).
Note: it's not the Exchange server FQDN, instead of the Exchange namespace in Internet.
More details, for your reference:
https://jaapwesselius.com/2017/05/16/moving-from-exchange-2010-to-office-365-part-ii/
Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.
Regards,
Allen Wang
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Friday, August 11, 2017 8:51 PM ✅Answered | 1 vote
It's the hostname where EOP is to send e-mail. It's likely the same name as you published for everything else.
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
Celebrating 20 years of providing Exchange peer support!
Friday, August 11, 2017 4:17 AM
On what page of the wizard does it ask for that? That is important context you left out of your question.
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
Celebrating 20 years of providing Exchange peer support!
Friday, August 11, 2017 12:45 PM
Hi
Here is the hybrid configuration wizard screen I am talking about -->
Friday, August 11, 2017 1:49 PM
That should be explanatory - it is for the cross-premises smtp mail flow on TCP 25.
You have reviewed all of the IP and Ports required?
Cheers,
Rhoderick
Microsoft Senior Exchange PFE
Blog: http://blogs.technet.com/rmilne Twitter:
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Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.
Monday, August 14, 2017 12:04 PM
So based on what I am seeing above answer to my question is that 443 & 25 are the ports that need to be open on "organization FQDN" fed to the hybrid wizard.
Thank you all for your response.
Tuesday, August 15, 2017 8:26 PM
If you use the same name, yes. You can have a different name for transport than you use for EWS (free-busy and mail tips), which is derived from Autodiscover. And you can have a third name if you want for mailbox moves. Or you can use one name and IP address for all.
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
Celebrating 20 years of providing Exchange peer support!