How To Increase Outlook Mailbox Size On Pc Or Mac With Pictures

For example, to make your mailbox 75 GB, type 75000 into the box. The default mailbox size for Outlook 2013 or 2016 is 50 GB. The default for Outlook 2003, 2007, and 2010 is 20 GB.

For example, if you’ve made your mailbox 75000 MB, you may want Outlook to warn you that you’re nearing the limit at 72000 MB.