Forum Discussion
Office 365, Hybrid, On-Prem CU Upgrade.Exchange 2016.
Hi Robert,
Since you do not have nothing pointing to Exchange, you can do the upgrade without any downtime.
See the upgrade paths in the below requirements.
If you're upgrading to Exchange 2016 CU4 from Exchange 2016 RTM, CU1, or CU2, is recommended that you install Exchange 2016 CU4 before .NET Framework 4.6.2 or .NET Framework 4.6.1 and its related post-release fixes.
After this install Exchange 2016 CU8 and then .NET Framework 4.7.1
Please see the requirements https://technet.microsoft.com/library/bb691354(v=exchg.160).aspx and here also https://technet.microsoft.com/library/aa996719(v=exchg.160).aspx.
HelloNunoAriasSilva , we have switched the MX recored to O365 . But weired thing happening. Majority of e-mails are going throgh O365 as per MX. But Some e-mails are still getting delivered throught the old e-mail gateway.
Any suggestion on this.
Hi Avinash1991,
How much time has passed the changes of MX record and what was the TTL of that record ?
Hi Avinash1991,
Every email's are routed through hybrid servers are from the same domains ? You only have one MX ? The source domains maybe have a direct route to your previous record.
HiNunoAriasSilva its been 3 days sice we have updated the MX. And We have set the TTL value to 5 min.
Also post switching the records to o365 does mails route through the hybrid servers.