Outlook for Mac (v16.100.1.25081721) crashes on launch – macOS 26 Beta

Title: Outlook for Mac (v16.100.1.25081721) crashes on launch – macOS 26 Beta

Body:

Hello,

I’m experiencing repeated crashes of Microsoft Outlook on macOS 26 Beta when trying to launch the app.

Details:

• Device: Mac (running macOS 26 Beta)

Outlook version: 16.100.1.25081721 (tested with both App Store and Microsoft direct installer)

Behavior: The app crashes immediately upon launch.

Error log (excerpt from Microsoft Error Reporting):

Exception: EXC_CRASH (SIGTRAP)
Application Version: 16.100.1.25081721
uncaught ObjC exception, reason: 
"The window has been marked as needing another Update Constraints in Window pass, 
but it has already had more Update Constraints in Window passes than there are views in the window."

Steps already tried:

Reinstalled Outlook from both App Store and Microsoft website.

Restarted the Mac and verified no pending macOS updates.

Same crash occurs every time.

Question:

Is Outlook currently supported on macOS 26 Beta?

If not, is there a known workaround (safe mode, reset preferences, plist removal, insider build) until official support is released?

Thank you for any guidance.

זה ינוסח בצורה שתגרום למומחי מיקרוסופט להבין מהר שמדובר בבטא – כלומר, או שיפנו אותך לערוץ Insider של Office, או שיאשרו שזה באג ידוע שייפתר בעדכון.

רוצה שאנסח לך גם גרסה עברית קצרה שתוכל לפרסם בקבוצות פייסבוק/טלגרם של משתמשי מק, כדי לראות אם אחרים בבטא נתקלו באותו דבר?מצוין, זו נקודה קריטית שחשוב לציין בפנייה – כי במערכות הפעלה בסטטוס בטא (macOS 15/16 Developer Beta – במקרה שלך macOS 26 Beta) הרבה פעמים הבעיה לא באפליקציה עצמה אלא באי־תאימות זמנית מול הבטא.

הנה נוסח מעודכן לפנייה לפורום מיקרוסופט באנגלית, כולל ציון מערכת ההפעלה:

Title: Outlook for Mac (v16.100.1.25081721) crashes on launch – macOS 26 Beta

Body:

Hello,

I’m experiencing repeated crashes of Microsoft Outlook on macOS 26 Beta when trying to launch the app.

Details:

Device: Mac (running macOS 26 Beta)

Outlook version: 16.100.1.25081721 (tested with both App Store and Microsoft direct installer)

Behavior: The app crashes immediately upon launch.

Error log (excerpt from Microsoft Error Reporting):

Exception: EXC_CRASH (SIGTRAP)
Application Version: 16.100.1.25081721
uncaught ObjC exception, reason: 
"The window has been marked as needing another Update Constraints in Window pass, 
but it has already had more Update Constraints in Window passes than there are views in the window."

Steps already tried:

Reinstalled Outlook from both App Store and Microsoft website.

Restarted the Mac and verified no pending macOS updates.

Same crash occurs every time.

Question:

Is Outlook currently supported on macOS 26 Beta?

If not, is there a known workaround (safe mode, reset preferences, plist removal, insider build) until official support is released?

Thank you for any guidance.