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Hello,
My company is moving from exchange 2010 to office 365.
Since now I have migrated 2500 mailboxes.
Now I would like to change the MX record pointing to office 365.
Its enought changing our dns or there are somo other configuration like
I have to rerun the hybrid configuration wizard?
Kind regards
No, you do not need to run the Wizard again.
You can simply change the MX record
https://learn.microsoft.com/en-us/exchange/decommission-on-premises-exchange
Assuming that you have already moved all of the mailboxes to Exchange Online, you can point the MX and Autodiscover DNS records to Exchange Online, instead of to on-premises. For more information, see External Domain Name System records for Office 365.
Make sure to update both the internal and external DNS, or you may have inconsistent client connectivity behavior.
Thank you so much Andy
,
I have migrated more than half the all mailbox if I understand correctly you suggest to make the change at the end of the whole migration.
Kind regards
Actually, you can that anytime unless you have left the MX record pointing to on-prem for technical reasons.
Typically, most orgs set the MX record to 365 before they start the migration:
https://learn.microsoft.com/en-us/exchange/transport-routing
BOTTOM LINE:
Unless you have compliance reasons, you can change anytime, or just wait till you are completely migrated and change the MX record them
No need to re-run the Hybrid Wizard!
Thank you Andy for your valuable help.
Kind regards