Microsoft's browser update left some New Outlook users unable to open email attachments. Classic Outlook, which Microsoft is phasing out, kept working.
Microsoft said an update to its Edge 156 browser "unintentionally enabled an unnecessary configuration," The Register reported on 29 October.
Some users of New Outlook for Windows lost the option to open attachments. The workaround was to save the file first. Microsoft expected its fix to take 12 hours to roll out, and users had to restart New Outlook.
New Outlook relies on parts that ship with the Edge browser. According to Microsoft's own advisory, classic Outlook did not appear to be affected.
Microsoft's migration plan, published on its Learn site, gives managed enterprises at least 12 months' notice before New Outlook becomes the default. Existing classic Outlook installations stay supported until at least 2029.
For CIOs signing off the move, that adds a line to the test plan. Moving staff to New Outlook puts email on the browser's update schedule, and a browser update can change how email works.
Microsoft had not told The Register what the "unnecessary configuration" was.
Sources
Our file on Microsoft
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