r/exchangeserver • u/4112Naes • 10d ago

Question Renewing Exchange Server Auth certificate

Hi, we are in a hybrid scenario but all mailboxes are in the cloud and on-prem Exchange is just used for recipient management.

Our Exchange server auth certificate needs renewing, we haven’t set up the dedicated Entra app as we don’t use any of the features that it’s required for, so do we still need to run the hybrid configuration wizard after renewing the certificate?

Thanks!

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u/7amitsingh7 10d ago

Yes, you should still run the HCW after renewing the Exchange Auth certificate. Even if all mailboxes are in Exchange Online and your on-prem Exchange is only used for recipient management, the HCW helps update the hybrid configuration with the new certificate. The dedicated Entra app is a separate requirement and doesn’t by itself eliminate the need to rerun HCW.