How to increase outlook mailbox size to 100gb

Last Updated: Feb 28, 2024 by

Outlook is a popular email client used by millions of people around the world. However, one common issue that many users face is running out of storage space in their mailbox. This can be frustrating, especially if you receive a lot of emails with large attachments. In this article, we will discuss how to increase your Outlook mailbox size to 100gb, so you never have to worry about running out of space again.

Check Your Current Mailbox Size

Before you can increase your mailbox size, it’s important to know how much space you currently have. To check this, open Outlook and go to the File tab. Then, click on “Account Settings” and select “Account Settings” again from the drop-down menu. In the new window, click on your email account and then click on “Change”. You will see the current size of your mailbox under the “Mailbox Size” section.

Archive Old Emails

One way to free up space in your mailbox is to archive old emails. This means moving emails that you no longer need to a separate folder. To do this, go to the File tab and click on “Cleanup Tools”. Then, select “Archive” and choose the folder you want to archive. You can also set a date range for the emails you want to archive. Once you have selected the options, click on “OK” and the emails will be moved to the designated folder.

Empty Deleted Items Folder

When you delete an email, it is moved to the “Deleted Items” folder. However, this folder still takes up space in your mailbox. To free up this space, go to the “Deleted Items” folder and click on “Empty Folder” in the Home tab. This will permanently delete all the emails in the folder and free up space in your mailbox.

Increase Mailbox Size Limit

By default, Outlook has a mailbox size limit of 50gb. However, this can be increased to 100gb. To do this, you will need to contact your email provider and request an increase in your mailbox size limit. They will be able to guide you through the process and make the necessary changes to your account.

Use Online Storage Services

If you frequently receive large attachments in your emails, it may be a good idea to use online storage services such as OneDrive or Google Drive. These services allow you to store large files and share them with others through a link. By using these services, you can save space in your mailbox and still have access to your files whenever you need them.


By following these steps, you can increase your Outlook mailbox size to 100gb and never have to worry about running out of space again. Remember to regularly check your mailbox size and archive old emails to keep your mailbox organized and clutter-free. If you still need more space, consider using online storage services to store large attachments. With these tips, you can make the most out of your Outlook experience and never have to delete important emails due to lack of space.

Gulrukh Ch

About the Author: Gulrukh Ch

Gulrukh Chaudhary, an accomplished digital marketer and technology writer with a passion for exploring the frontiers of innovation. Armed with a Master's degree in Information Technology, Gulrukh seamlessly blends her technical prowess with her creative flair, resulting in captivating insights into the world of emerging technologies. Discover more about her on her LinkedIn profile.