Microsoft has fixed the issue that caused Outlook Mail and Calendar to not be listed in the Store Beta on Windows 10. Gabe Aul announced the fix on twitter and it is available now.
#WindowsInsiders The Store team has fixed the issue that caused Outlook Mail and Calendar to not be listed on PC. Available again as of now.
— Gabriel Aul (@GabeAul) May 29, 2015
The apps went missing about a week ago:
— Antonio Contreras (@viceroy101) March 22, 2015
Windows 10 continues to move forward and bumps like this can happen when working on a preview build. Gabe Aul is quick to inform Windows Insiders with information about any progress involving Windows 10. While the Insiders Feedback program is working well, it’s also nice to have a human touch responding to specific questions on Twitter.