Hi Jeremy1
To access
https://web.mail.mil in Sub Rosa for Android, 2 settings within the app need to be disabled. Launch Sub Rosa then tap the 3-dot menu icon in the top-right. Select Settings towards the bottom of the menu. First, uncheck Enhanced OWA Client to disable it. Second, scroll down to the Security section and uncheck FIPS 140-2 mode. Back out of settings then re-load
https://web.mail.mil. Make sure to select the "Email Signing" certificate when prompted, then enter your CAC PIN# in the pin pad. Please let us know if you have any more questions. Have a great weekend!
Sincerely,
Kim K.
Support Department
Thursby Software Systems, Inc.| Arlington, TX