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Delete OnPrem Mailbox ?

Anonymous
2016-05-19T03:47:27+00:00

Hi all,

We have an onPrem Exchange Server with 300 Mailboxes. We have migrated alle Users to Office 365 and everything works fine. 

But..

Die Mailboxes onPrem need a lot of Disk Space... When i delete the Mailbox OnPrem the User ProxyAdresse are gone so what a supported why to geht rid of the OnPremise Mailboxes? 

The next ist i have to move the Maiboxes onPrem to a new on Prem Exchange (in a Datacenter) because we want to get rid of our on Prem Infrastructure.

Thanks for help

Skykitchen

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

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  1. Anonymous
    2016-05-19T05:15:40+00:00

    Hi Skykitchen,

    According to your description, do you mean that you have DirSync/AAD Sync/AAD Connect deployed?

    If so, we can’t delete mailboxes directly since all the changed made in the on-premises will be synced to Office 365. In this way, we suggest you first back up all the mailboxes’ data, then convert the on-premises mailboxes to mail-enabled users.

    About the detailed steps about how to convert the mailboxes to mail-enabled users, since it’s related to the on-premises, we suggest you post the issue with details in our on-premises Exchange Server Forum via: https://social.technet.microsoft.com/Forums/en-us/home?category=exchangeserver%2Cexchangeserverlegacy&filter=alltypes&sort=lastpostdesc. Your understanding is appreciated.

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