Configure message size limits for a mailbox!!!

Configure message size limits for a mailbox

You can control the size of messages that recipients can send and receive. If a user sends a message larger than the specified size, the message will be returned to the user with a descriptive error message. If the user receives a message larger than the specified size, the message will be returned to the sender with a descriptive error message.

To configure message size limits for a mailbox

Do one of the following:

1. Sign in to Office 365 with your work or school account.

Tip   You need to sign in as either a Global admin or a Billing admin.

2. Select the app launcher icon in the upper-left and choose Admin.
3. Select exchange Option
4. In the EAC ( Exchange Admin Center), navigate to Recipients> Mailboxes.
5. In the list of user mailboxes, click the mailbox that you want to change the message size limits for,
6. Then click Edit.

7 .On the mailbox properties page, click Mailbox Features.

8 .Under Message Size Restrictions, click View details to view and change the following message size limits:

• Sent messages to specify a maximum size for messages sent by this user, select the Maximum message size (KB) check box and type a value in the box. The message size must be between 0 and 2,097,151 KB. If the user sends a message larger than the specified size, the message will be returned to the user with a descriptive error message.
• Received messages to specify a maximum size for messages received by this user, select the Maximum message size (KB) check box and type a value in the box. The message size must be between 0 and 2,097,151 KB. If the user receives a message larger than the specified size, the message will be returned to the sender with a descriptive error message.

9 .Click OK, and then click Save to save your changes.