Unable to update the mailbox properties after being converted from shared mailbox to a regular mailbox.

Summer 1 Reputation point
2022-03-16T12:25:00.48+00:00

A shared mailbox was converted to a regular mailbox in exchange 2016 hybrid environment.
Though the shared mailbox is converted to regular mailbox but still it shows under shared tab in exchange admin center.
How would we manage the properties of the this mailbox?

https://portal.office.com/adminportal : Its still shows as shared mailbox.
https://admin.exchange.microsoft.com/ : This shows that its regular mailbox.
https://outlook.office365.com/ecp/ : It shows that its a shared mailbox.

How would be manage and reflect this converted mailbox under correct place?

Microsoft Exchange Online Management
Microsoft Exchange Online Management
Microsoft Exchange Online: A Microsoft email and calendaring hosted service.Management: The act or process of organizing, handling, directing or controlling something.
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Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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2 answers

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  1. Andy David - MVP 142.8K Reputation points MVP
    2022-03-16T13:11:22.73+00:00

    Run this in Exchange Online powershell:

    set-mailbox <shared> -Type regular
    
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  2. KyleXu-MSFT 26,211 Reputation points
    2022-03-21T09:33:11.63+00:00

    @Summer

    Does this shared mailbox created on Exchange on-premises, then migrated to Exchange online and change mailbox type from Exchange online?

    How do you convert this shared mailbox? I try to convert it from the old Exchange online admin center, it could sync to all other admin centers. But this mailbox still show as shared mailbox on Exchange on-premises admin center.

    So, I would suggest you migrate it back to Exchange on-premises, then change mailbox type on Exchange on-premises. After that, migrate it back to Exchange online.


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