iOS 15 RC Build number - 19A344 was released on 14 Sep, 2021 | iOS Release Notes

iOS 15 RC
Build number - 19A344 was released on 14 Sep, 2021 for:
• iPhone 12, 12 Pro/Max, 12 Mini, SE(2G), 11, 11 Pro/Max, XR, XS/Max, X, 8/8+, 7/7+, SE, 6s/6s+
• iPad 8G, 7G, 6G, 5G
• iPad mini 5, 4
• iPad Air 4, 3, 2
• iPad Pro 12.9(5G) 12.9(4G), 12.9(3G), 10.5, 9.7, 11, 12.9(2G), 12.9(1G)
• iPod Touch 7G.

New Issues:
• Microsoft 365 apps (word excel PowerPoint) will crash upon launch if the user uses work or school SSO to sign in.

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