Microsoft has set a default size for mailboxes in different Office 365 plans. These are important considerations which an Office 365 administrators should consider for the proper functioning of the Office 365 mailboxes. Here is the default mailbox size for different Office 365 plans.
Office 365 Plan
Default Size of Mailboxes
Note: Microsoft has set a default size for archive mailboxes, shared mailboxes, resource mailboxes, site mailboxes, public folder mailboxes, and group mailboxes also
This default size can be increased or decreased as per the user requirements. More often, users seek to increase the size depending upon the conditions and needs. Some of the primary situations are:
We can carry out the steps described below to increase the size of the Office 365 mailboxes from the current set sizes.
Running Set-Mailbox cmdlets in Exchange Online PowerShell is the way to increase the Office 365 mailbox size. For this, users must run Windows PowerShell as administrator and, connect to Exchange Online with the following command.
A dialogue box will get open, Here, enter the Office 365 account administrator credentials and click OK.
Run this command to import the Remote PowerShell session.
To set the size for a particular mailbox, run this command.
Note: You can check the values of mailbox quota by running: Get-Mailbox < User ID > | Select *quota
If you want to set the maximum mailbox size for all the mailboxes in the account altogether, execute this command.
Users can increase their Office 365 mailbox size anytime using these methods. To know more about the mailbox storage limits, visit https://docs.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits#mailbox-storage-limits