Outlook 16.109.3 crashes on launch on macOS 26 (Tahoe beta) - UTI Info.plist regression

Environment:

• macOS 26.5.1 Build 25F80 (Tahoe beta)
• - Microsoft Outlook 16.109.3 (build 26053122)
• - MacBook Air Mac14,2 arm64, 16GB

Issue:

Outlook crashes immediately on every launch. Occurs on clean install with no profile. Tested two builds (26053122 and 26051019) - both crash identically.

Root cause from system logs:

macOS 26 has tightened UniformTypeIdentifiers enforcement. Outlook's Info.plist is missing explicit declarations for 12+ com.microsoft UTI types. On every launch:

"UniformTypeIdentifiers: Type 'com.microsoft.DataObject' was expected to be declared and exported in the Info.plist of Microsoft Outlook.app, but it was not found."

Same error fires for: com.microsoft.Embedded-Object, EMF-Plus, GIF-Office-Art, Ink-Serialized-Format, JFIF-Office-Art, Link-Source-Descriptor, Object-Descriptor, Embed-Source, PNG-Office-Art, Office-Drawing-Drag-Drop-Format, Office-Drawing-Shape-Format.

Secondary error: /private/var/db/DetachedSignatures does not exist on macOS 26, causing an SQLite open failure in libsqlite3.

Workaround: None. Outlook Web only until a fix ships.

Ask: Please update Outlook's Info.plist to explicitly declare all com.microsoft UTI types to comply with macOS 26's stricter enforcement. This will affect all Microsoft 365 Mac apps when macOS 26 ships publicly this fall.