Apple says it is expanding the number of users with its Outlook Web Access app

Apple said Tuesday it has added more than 500 million Outlook Web Accounts to its App Store and Google Play, and the move will allow users to access its online services from mobile devices.

The move was announced in a blog post by Apple that highlighted how users now have access to more than 5.6 billion Outlook Web accounts, which have been available since October 2016.

Apple said it will continue to provide an array of tools, including in-app notifications, to improve app availability.

The move also brings the number Apple provides to over 5 billion.

Apple is offering new versions of Outlook Web access on Mac and iOS.

The announcement comes as Apple faces a slew of challenges in its battle to gain market share in a crowded field of digital services from the likes of Facebook, Twitter, Amazon and Microsoft.

The company also announced a deal with Google to make its apps available in the Google Play store, a move that would open up access for apps on Google’s mobile platform to users with Apple’s iPhone, iPad and Mac platforms.

The app store will be a hub for Apple’s services including iTunes, iMessage, Maps and iPhoto, which will make it easier for users to find and purchase content.