Forum Discussion

AbdJabbar's avatar
AbdJabbar
Copper Contributor
Mar 18, 2020

errorThe connection to the server '*********' could not be completed.

Hello everyone Does anyone know about my constraints on this, I want to migrate my email Exchange 2010 to Office 365 but I get a problem like in the picture   Thanks
2010
exchange online
Exchange Server
hybrid
office 365
outlook
JeremyTBradshaw's avatar
JeremyTBradshaw
Steel Contributor
Mar 20, 2020

AbdJabbar Hi there,

 

For this issue, your best move is to first get Autodiscover and EWS working using the Remote Connectivity Analyzer (a.k.a. RCA, https://testconnectivity.microsoft.com -> "Exchange Server" tab, use this one: "Microsoft Exchange Web Services Connectivity Tests", and use the Autodiscover option).

 

Note that the RCA used to use different IP's than Exchange Online, so your firewall had to also allow the RCA IP's in via HTTPS to your Exchange Autodiscover/EWS servers.  This is no longer documented so I would say at least make sure that you have allowed the EXO IP's in the 1st row of this table (ID 1):

https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-ranges#exchange-online

 

You should be able to succeed on the RCA before you bother trying to setup the migration endpoint, especially if you've tried and failed with the latter already.