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chrisandrewmann's avatar
chrisandrewmann
Copper Contributor
Jun 19, 2026

Outlook Mobile 5.2623.0 Android - Addins hang whilst loading

I develop and addin and have been testing it, only recently after update to latest Outlook Mobile on Android, it hangs during Office.onReady()
I've tested it on 2 different devices and also tried other addins which also fail to load.

  • Outlook Mobile 5.2623.0 on Android
  • Office.context.mailbox is null, Office.onReady() never resolves
  • Reproducible with multiple vendors (my own adding and two Zoho add-ins)
  • Two devices, different OS versions - Samsung One UI 8.0 and 8.5 (Android 16)
  • Regression: add-ins worked prior to this update

Appreciate any help. Thanks

outlook for android

2 Replies

  • chrisandrewmann's avatar
    chrisandrewmann
    Copper Contributor
    Jul 05, 2026

    Thanks Jamony. I forgot to update here. MS agreed it was a regression and fixed now.

    https://github.com/OfficeDev/office-js/issues/6774#issuecomment-4776488345

  • Jamony's avatar
    Jamony
    MCT
    Jul 05, 2026

    Hi, because multiple add-ins from different vendors fail after the same Outlook Mobile update, this looks more like an Outlook host regression than your add-in code. I’d collect the Outlook build, Android version, affected devices, add-in manifest details, and a simple repro case. Then raise it through Microsoft 365 support or the Office Add-ins developer channel.