How to Increase Mail Attachments Size in Office 365 Exchange Online

Office 365 is a cloud-based email platform developed by Microsoft. It provides many more advanced facilities compare with other email clients. The user can easily operate and access exchange online in any devices. It gives high security and technical support for the user, which helps to secure the user’s data. In the reason, many users and companies are switching the accounts in O365. The default size of office 365 mailbox message size is 150 MB before it was only 25 to 35 MB. However, 150 MB is not enough size for the user to send and receive the data to other users with attachments so the user needs to Increase Mail Attachment Size in Office 365 to send and receive the data easily and completely without any issue.

Method to Increase mail attachments size-

To increase the mail attachment size in Office 365 there are two methods, one is the by Exchange Online Admin Centre and another one is by using Powershell. Both methods are easy to increase the mail attachment size in exchange online.

Exchange Online Admin Centre (EAC)- In Office 365

If the user wants to increase the mail attachment size by use Exchange Online Admin center then follow these steps-

1- Firstly, login in Office 365 account and select on Admin center option then click on Exchange option.

Login Office 365 Account

2- In the Exchange Admin center window, click on Recipients section and then click on Mailboxes option. Now click on the (…) sign and choose on set default message size restrictions option.

Default Message Size Restrictions

3- Open, Set default message size restriction dialogue box the user can fill the maximum size limit for sent and received messages then click on OK button.

Default Message Size Restrictions

4- Now In the Exchange admin center window, search the message size restriction option, which is visible on the right side of Windows and click on the update option, which is below it.

5- Following these steps of the Exchange Admin center, the user can easily expand the size of the mailbox attachments.

By using Powershell Command-

The user can also increase the mail attachment size by using Powershell command. To increase mail attachment size by using Powershell follows these steps and commands-

  • Firstly, Connect the Powershell to the cloud platform and login with the Office 365 Admin account by using the given command.
    $Cred = Get-Credential
    Login in Microsoft Office 365
    $Session=New-PSSession –ConfigurationName Microsoft.Exchange –ConnectionUri -Credential $Cred –Authentication Basic –AllowRedirection
  • Now Run the below command to import the PS Session to O365
    Import-PSSession $Session
  • Now, Set the Office 365 attachment size limit for a single mailbox, you need to run the following command.
    Set-Mailbox “admin id of office 365 account” -ProhibitSendQuota 18GB -ProhibitSendReceiveQuota 19GB -IssueWarningQuota 20GB
  • Then, the Current list of quota is attached to the mailbox.
    Get-Mailbox “Admin user ID” | Select *quota
  • To set the maximum limit of the size of multiple mailboxes at once using the command.
    Get-Mailbox | Set-Mailbox -ProhibitSendQuota 19GB -ProhibitSendReceiveQuota 20GB -IssueWarningQuota 18GB

By using these commands, the user can easily increase the mail attachment size of Exchange online.

Conclusion- I have given very easy methods to increase the size of mail attachments from Office 365. By using both methods, the user can easily increase the mail attachment size. If you have, any question related to this then you can leave a message in the comment box provided below.

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