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johnnyhong's avatar
johnnyhong
Brass Contributor
Jan 03, 2024

How to migrate mailbox with over 500 GB - Migration from GWS to M365

Hello,

I am trying to migrate GWS mailboxes with over 500 GB to M365 utilizing third-party tool.

I have around 50 mailboxes over 200 GB and 10 mailboxes over 500 GB.

With third-party tool, I can migrate Gmail to archive mailbox of M365.

and I am aware of the fact that it needs auto-expanding feature of archive mailbox.

So I have enabled auto-expanding feature for those archive mailbox.

 

However, the thing is the daily growth rate and 

It cannot exceed 1GB/day as I noticed through below link.

https://learn.microsoft.com/en-us/purview/enable-autoexpanding-archiving#more-information

The link says like this.

Auto-expanding archiving is supported only for mailboxes used by individual users or for shared mailboxes with a growth rate that doesn't exceed 1 GB per day.

 

Is there any way to speed up the growth rate?

 

 

And provisioning speed also matters.

https://learn.microsoft.com/en-us/purview/enable-autoexpanding-archiving#before-you-enable-auto-expanding-archiving 

the link goes like under.

After you turn on auto-expanding archiving, an archive mailbox is converted to an auto-expanding archive when the archive mailbox (including the Recoverable Items folder) reaches 90 GB. It can take up to 30 days for the additional storage space to be provisioned.

 

Is there any way to shorten the days for the additional storage space to be provisioned?

 

How can I overcome this circumstances?

or is there an other method to do this?

 

Thank you in advance.

  • Gavi43's avatar
    Gavi43
    Copper Contributor

    To migrate GWS mailboxes (including 50 over 200 GB and 10 over 500 GB) to M365, use a third-party tool for Gmail migration. Ensure the auto-expanding feature is enabled for M365 archive mailboxes to accommodate the large data volumes during the migration process.

  • Maluks's avatar
    Maluks
    Iron Contributor
    I think regarding your topic you should talk to Microsoft support directly, this forum can only assist you in guiding you towards correct direction. Anything outside official support documentation should be addressed directly to MS.
    I feel that such large mailboxes should not exist in MS world and a process how to keep them in the standard size should be implemented, or the Exchange system is not the correct tool for use.

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