Adjustment of Office 365:Mailbox Migration considerations Mailbox Size

Blog address: https://blog.51cto.com/13969817

At present, many companies IT have planned to migrate user mailboxes to Office 365for centralized management, such as NetEase mailbox-> Exchange Online, such as Gmail- > Exchange Online, such as Mailbox migration of different Office 365Tenant, etc., but due to lack of prior consideration in the process of migration, the Mailbox size default 50GB of the new platform is smaller than the storage value of the old platform and is not adjusted in time before migration, resulting in the failure of mailbox migration. So we must make a good plan before we migrate. For example, take Office 365 as an example, the default size for different Office 365plan,Mailbox is different, refer to the following table.

The default message size in Office 365mailbox is 25MB, but the message Size of some companies with high level is much larger than 25MB. When migrating mailboxes, you also need to adjust the Size to 75MB in advance to avoid the storage space exceeding the limit and the migration fails.

Let's share how to adjust Mailbox Size from 50GB to 100GB through Windows PowerShell.

1. Connect to the Exchange Online:

$Session = New-PSSession-ConfigurationName Microsoft.Exchange-ConnectionUri https://outlook.office365.com/powershell-liveid/-Credential $UserCredential-Authentication Basic-AllowRedirection

two。 Enter the user name and password of Office 365 Global Admin:

3. Import Remote PowerShell Session

Set Mailbox Size for employees in need. For example, the Mailbox size of Byron is 100 GB, and the Limit of send is 19 GB,Warning Limitation:18 GB

Set-Mailbox byron0928@XXXTrainingCN.onmicrosoft.com-ProhibitSendQuota 99GB-ProhibitSendReceiveQuota 100GB-IssueWarningQuota 98GB

Check whether the setting has been updated with Get-Mailbox byron0928@XXXTrainingCN.onmicrosoft.com | Select * quota

For more information:

All users in the enterprise set Mailbox size: the command is:

Get-Mailbox | Set-Mailbox-ProhibitSendQuota

< Value >

-ProhibitSendReceiveQuota

< Value >

-IssueWarningQuota

< Value >

A user of a department in the enterprise sets the Mailbox size command to:

Get-User | where {$_ .Department-eq "Sales"} | Get-Mailbox | Set-Mailbox-ProhibitSendQuota

< Value >

-ProhibitSendReceiveQuota

< Value >

-IssueWarningQuota

< Value >

How to add more Mail Attachment Size links to employees: Set-Mailbox, Exchange Online Limits