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Gordon Tin
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After I cutover migrate all mailboxes to exchange online (before I change the DNS MX and A records "Autodiscover") >>> Is my on prem exchange 2016 Server are still available to users????

Background

-------------

On prem to Azure Ad sync ----ok

AD Users already sync to Azure AD---ok

Planning not to use hybrid exchange because of future email attributes control difficulty.


I found that the cutover mailbox migration grey out, I can't use cutover migrate. After I turn off Azure Dirsync, the cutover migration is available now from class Exchange Admin Center and I successfully created mailbox migration batch.


Currently, the Public DNS is still pointing to the on prem exchange 2016 Server.  


I am in the step of evaluating the Exchange online.


After I cutover migrate all mailboxes to exchange online (before I change the DNS MX and A records "Autodiscover") >>> Is my on prem exchange 2016 Server are still available to users????


 



ExchangeDNSAzureMicrosoft 365

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Gordon Tin

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
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Gordon Tin

ASKER
@MAS

I should ask my question in details.

1. I would like to know whether mailbox migration batch ONLY sync mailbox from on prem exchange to exchange online.     AM I Correct????

2. Migration batch perform NO other action to on prem exchange server.   AM I correct ?????
 
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