Mac users blocked from O365 webmail (USMC, Navy, AF)

macos

Symptoms

Mac OWA login at https://o365.usmc.mil, https://webmail.cloud.navy.mil, or https://usaf-my.dps.mil fails.

Likely cause

Site sniffs Safari and refuses it; user lacks an authorized account in the new tenant.

Fix

1. First, call NMCI/your help desk and ensure your CAC is authenticated to the new account. 2. Option A: install Microsoft Edge for Mac and use Edge to log in. 3. Option B: Safari > Preferences > Advanced > tick Show Develop menu > Develop > User Agent > Microsoft Edge > revisit the URL.

Sourced from militarycac.com. Rewritten for clarity.

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