Service Notes – Information Technology Services

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Date	Description
03/31/2026	Some Mac users experienced intermittent inability to access MS365 Exchange mailboxes in Apple Mail on February 16, with a "com.apple.accounts error 3" after Duo MFA (users could log in but sync failed). Service appears stable today, but this is tied to Apple Mail's reliance on Exchange Web Services (EWS), which Microsoft is phasing out: phased disablement starts October 1, 2026, with full retirement by April 1, 2027. Microsoft Source Immediate solutions: Use Outlook on the web: outlook.office.com Install Microsoft Outlook for Mac: Setup guide These are fully supported and unaffected. Apple may release a patch for compatibility, but we recommend transitioning now to avoid future disruptions. Need help? Submit a ticket at OTRS or contact the IT Service Center at (660) 785-4454.

Date

Description

03/31/2026

Some Mac users experienced intermittent inability to access MS365 Exchange mailboxes in Apple Mail on February 16, with a "com.apple.accounts error 3" after Duo MFA (users could log in but sync failed). Service appears stable today, but this is tied to Apple Mail's reliance on Exchange Web Services (EWS), which Microsoft is phasing out: phased disablement starts October 1, 2026, with full retirement by April 1, 2027. Microsoft Source

Immediate solutions:

Use Outlook on the web: outlook.office.com
Install Microsoft Outlook for Mac: Setup guide

These are fully supported and unaffected. Apple may release a patch for compatibility, but we recommend transitioning now to avoid future disruptions.

Need help? Submit a ticket at OTRS or contact the IT Service Center at (660) 785-4454.

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