On converting user mailbox with 100 GB of data to shared mailbox. Will it remove the rest of the 50 GB data?

Question

On converting user mailbox with 100 GB of data to shared mailbox. Will it remove the rest of the 50 GB data?

Audi86 781

hi,

what will happen, if we convert 100 GB user mailbox to shared mail box. As per Microsoft documentation shared mailbox will switch to 50 GB by default. so will the rest of the data be just lost or will it just sit there with excess quota?
thanks

Jame Xu-MSFT 4,191 Reputation points

2022-09-16T07:17:32.407+00:00

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Jame Xu-MSFT 4,191 Reputation points

2022-09-16T07:17:32.407+00:00

Hi, I'm here to confirm with you if your issue has been resolved. If the problem is successfully solved, you can share your solution and mark them or the helpful reply as answer, this will make answer searching in the forum easier and be beneficial to other community members as well.

Answer 1

Jame Xu-MSFT 4,191

Hi @Audi86 ,
The data will not be lost. If you have the Exchange Online Plan 2 license, it will work fine. If not, when you convert the user mailbox to shared mailbox, the shared mailbox could not send or receive emails.
Reference:

Related Links:
https://techcommunity.microsoft.com/t5/exchange-team-blog/correcting-shared-mailbox-provisioning-and-sizing/ba-p/607991
https://learn.microsoft.com/en-us/microsoft-365/admin/email/convert-user-mailbox-to-shared-mailbox?view=o365-worldwide

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Audi86 781 Reputation points

2022-09-14T18:03:46.427+00:00

@Jame Xu-MSFT thanks for response. what will happen to one drive data in this scenario. for example if the user has one drive data, converting the mailbox to shared mailbox and let say swaping E5 license with exchange plan 2, will it retain the one drive data as well. My understanding is one drive data will only go away or lost if user is being deleted, correct?

Answer 2

Hi @Audi86 ,
Neither removing the license, or converting to a shared mailbox remove the One Drive Files.
You could refer to this similar case:
https://learn.microsoft.com/en-us/answers/questions/180591/converted-users-to-shared-mailbox-and-onedrive.html

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On converting user mailbox with 100 GB of data to shared mailbox. Will it remove the rest of the 50 GB data?

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