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Anton5032's avatar
Anton5032
Copper Contributor
May 29, 2020
Solved

Hybrid Exchange change of SMTP relay connector

Hi All   So we have Hybrid Exchange environment, with few 2010 Exchange boxes on-prem, 1x Exchange 2016 on-prem (as the hybrid) and O365 tenant. Until now we were using one of the EX2010 boxes as ...
2010
2016
admin
exchange online
Exchange Server
hybrid
office 365
  • PeterRising's avatar
    PeterRising
    Jun 02, 2020

    Anton5032 

     

    Whenever I setup a connector for this purpose on an Exchange 2016 Server, I always set the security tab options as follows;

     

    I would definitely double and triple check your firewall rules too.  Do you definitely have the Exchange Online IP's all allowed for the Exchange 2016 server?

Harry_brook's avatar
Harry_brook
Copper Contributor
May 27, 2024

Anton5032 

It sounds like there might be a configuration issue with the SMTP relay connector on your hybrid Exchange 2016 server. Double-check the connector settings to ensure they match those of the Exchange 2010 server. Also, verify that the firewall rules are correctly configured to allow traffic from the hybrid server to Exchange Online. If the issue persists, consider reaching out to your IT support or consulting with a https://digitalaka.com/voice-sms-service/ for assistance.

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