Microsoft has blocked a raft of file extensions from being downloaded by Outlook web users. The firm said that organisations can manually whitelist any file extension types if they need them.
Windows 11 in Release Preview adds urgent notifications bypass and more
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Windows 11 released to Dev Channel and ISO comes with File Explorer tabs
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Dark mode, one of Outlook.com's newer features, was a tad lacking in terms of customization upon release. This seems to now be in the process of being rectified with the introduction of themes.