Microsoft doubles Exchange Online mailbox storage from 25GB to 50GB August 29, 2013 by admin Tweet Microsoft has announced that it is rolling out a chance for Office 365 business users that will see their Exchange Online mailbox storage limits increase from 25GB to 50GB at no extra cost. Read more… Neowin Related Posts:Microsoft will add External Recipient Rate email…Microsoft will shut down Exchange Web Services in…With Basic Auth in Exchange Online dead, this is…Microsoft will disable Basic Auth for Exchange…Microsoft confirms massive issues and outage across…