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SharePoint document embeds stuck on Sign In screen [worldwide bug + reproducible]
Iframe embeds of SharePoint documents (Excel, PowerPoint, Word etc) show the "Sign In" screen regardless of access permissions. Clicking sign in opens a popup, authenticates, closes popup, and no red...
Update: as of about 2024-04-29T20:30:00 (UTC) this just started working again for us. Seems like MS fixed whatever broke before we could get to the bottom of it. We had started entering the ticket and in reproducing the steps noticed it had started working. It was definitely still broken as of 2-3 hours ago for our tenant though.
It is worth noting that our experience with this issue (in Dynamics CRM specifically) includes having made sure all the needed domains are included in the SharePoint Site Settings -> HTML Field Security settings.