No Market Share movement for Outlook Web App yet sorry.
Get a list of 3,344 websites using Outlook Web App which includes location information, hosting data, contact details, 498 currently live websites
and an additional 96,727 domains that redirect to sites in this list. 2,846 sites that used this technology previously and 158 websites in the United States currently using Outlook Web App.
Distribution of locations of all Outlook Web App customers we've ever tracked.