No Market Share movement for Outlook Web App yet sorry.
Get a list of 3,303 websites using Outlook Web App which includes location information, hosting data, contact details, 3,962 currently live websites
which includes 3,486 domains that redirect to sites in the list. 2,827 sites that used this technology previously and 139 websites in the United States currently using Outlook Web App.
Distribution of locations of all Outlook Web App customers we've ever tracked.