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Office 2016 and Office 2019 have reached the end of support: https://support.microsoft.com/en-us/office/end-of-support-for-office-2016-and-office-2019-818c68bc-d5e5-47e5-b52f-ddf636cf8e16.

This PR addresses that by altering our documentation to list the minimum version of Office needed as 2021. As part of this, Trident and Edge Legacy WebView are no longer used by Office clients in the support window. To simplify our documentation, I'm removing the content about dealing with those browser controls.

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Learn Build status updates of commit 99f1bef:

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docs/develop/support-ie-11.md

  • [Suggestion: file-not-redirected - See documentation] File docs/develop/support-ie-11.md with URL /office/dev/add-ins/develop/support-ie-11 was deleted without redirection. To avoid broken links, add a redirection.

docs/testing/debug-add-ins-using-devtools-edge-legacy.md

  • [Suggestion: file-not-redirected - See documentation] File docs/testing/debug-add-ins-using-devtools-edge-legacy.md with URL /office/dev/add-ins/testing/debug-add-ins-using-devtools-edge-legacy was deleted without redirection. To avoid broken links, add a redirection.

docs/testing/debug-add-ins-using-f12-tools-ie.md

  • [Suggestion: file-not-redirected - See documentation] File docs/testing/debug-add-ins-using-f12-tools-ie.md with URL /office/dev/add-ins/testing/debug-add-ins-using-f12-tools-ie was deleted without redirection. To avoid broken links, add a redirection.

docs/testing/ie-11-testing.md

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Learn Build status updates of commit 1a64d61:

✅ Validation status: passed

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.markdownlint.json ✅Succeeded
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@AlexJerabek AlexJerabek marked this pull request as ready for review November 7, 2025 20:41
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A very careful and thorough PR. You should consider getting work as a tech writer. ;-)

AlexJerabek and others added 3 commits November 10, 2025 10:07
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Learn Build status updates of commit aae252f:

✅ Validation status: passed

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.markdownlint.json ✅Succeeded
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docs/concepts/add-in-development-best-practices.md ✅Succeeded View
docs/concepts/browsers-used-by-office-web-add-ins.md ✅Succeeded View
docs/concepts/requirements-for-running-office-add-ins.md ✅Succeeded View
docs/design/add-in-commands.md ✅Succeeded View
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Learn Build status updates of commit 1ad48be:

⚠️ Validation status: warnings

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docs/includes/auto-open-webview2-dev-tools.md ⚠️Warning View Details
docs/testing/debug-add-ins-using-devtools-edge-chromium.md ⚠️Warning View Details
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docs/concepts/browsers-used-by-office-web-add-ins.md ✅Succeeded View
docs/concepts/requirements-for-running-office-add-ins.md ✅Succeeded View
docs/design/add-in-commands.md ✅Succeeded View
docs/design/add-in-icons-monoline.md ✅Succeeded View
docs/design/add-in-icons.md ✅Succeeded View
docs/design/task-pane-add-ins.md ✅Succeeded View
docs/develop/add-ins-with-angular2.md ✅Succeeded View
docs/develop/agents-toolkit-overview.md ✅Succeeded View
docs/develop/configure-your-add-in-to-use-a-shared-runtime.md ✅Succeeded View
docs/develop/create-sso-office-add-ins-aspnet.md ✅Succeeded View
docs/develop/create-sso-office-add-ins-nodejs.md ✅Succeeded View
docs/develop/debug-office-add-ins-in-visual-studio.md ✅Succeeded View
docs/develop/dialog-handle-errors-events.md ✅Succeeded View
docs/develop/enable-nested-app-authentication-in-your-add-in.md ✅Succeeded View
docs/develop/referencing-the-javascript-api-for-office-library-from-its-cdn.md ✅Succeeded View
docs/develop/specify-office-hosts-and-api-requirements-unified.md ✅Succeeded View
docs/develop/specify-office-hosts-and-api-requirements.md ✅Succeeded View
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This comment lists only the first 25 files in the pull request.

docs/includes/auto-open-webview2-dev-tools.md

  • Line 7, Column 145: [Warning: bookmark-not-found - See documentation] Cannot find bookmark '#debug-a-task-pane-add-in-using-microsoft-edge-chromium-based-developer-tools' in 'testing/debug-add-ins-using-devtools-edge-chromium.md'.
  • Line 7, Column 145: [Warning: bookmark-not-found - See documentation] Cannot find bookmark '#debug-a-task-pane-add-in-using-microsoft-edge-chromium-based-developer-tools' in 'includes/auto-open-webview2-dev-tools.md'.

docs/testing/debug-add-ins-using-devtools-edge-chromium.md

  • Line 57, Column 68: [Warning: bookmark-not-found - See documentation] Cannot find bookmark '#debug-a-task-pane-add-in-using-microsoft-edge-chromium-based-developer-tools' in 'testing/debug-add-ins-using-devtools-edge-chromium.md'.

docs/design/add-in-icons-fresh.md

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Learn Build status updates of commit 15a9e98:

✅ Validation status: passed

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.markdownlint.json ✅Succeeded
.openpublishing.redirection.json ✅Succeeded View
docs/concepts/add-in-development-best-practices.md ✅Succeeded View
docs/concepts/browsers-used-by-office-web-add-ins.md ✅Succeeded View
docs/concepts/requirements-for-running-office-add-ins.md ✅Succeeded View
docs/design/add-in-commands.md ✅Succeeded View
docs/design/add-in-icons-fresh.md ✅Succeeded n/a (file deleted or renamed)
docs/design/add-in-icons-monoline.md ✅Succeeded View
docs/design/add-in-icons.md ✅Succeeded View
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docs/develop/add-ins-with-angular2.md ✅Succeeded View
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docs/develop/configure-your-add-in-to-use-a-shared-runtime.md ✅Succeeded View
docs/develop/create-sso-office-add-ins-aspnet.md ✅Succeeded View
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docs/develop/support-ie-11.md ✅Succeeded n/a (file deleted or renamed)
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Thanks @Rick-Kirkham! I've updated the PR based on your feedback, though I know we still have a couple pending threads internally.

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AlexJerabek and others added 2 commits November 10, 2025 10:35
Co-authored-by: Elizabeth Samuel <elizs@microsoft.com>
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Learn Build status updates of commit fc3dce6:

✅ Validation status: passed

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.markdownlint.json ✅Succeeded
.openpublishing.redirection.json ✅Succeeded View
docs/concepts/add-in-development-best-practices.md ✅Succeeded View
docs/concepts/browsers-used-by-office-web-add-ins.md ✅Succeeded View
docs/concepts/requirements-for-running-office-add-ins.md ✅Succeeded View
docs/design/add-in-commands.md ✅Succeeded View
docs/design/add-in-icons-fresh.md ✅Succeeded n/a (file deleted or renamed)
docs/design/add-in-icons-monoline.md ✅Succeeded View
docs/design/add-in-icons.md ✅Succeeded View
docs/design/task-pane-add-ins.md ✅Succeeded View
docs/develop/add-ins-with-angular2.md ✅Succeeded View
docs/develop/agents-toolkit-overview.md ✅Succeeded View
docs/develop/configure-your-add-in-to-use-a-shared-runtime.md ✅Succeeded View
docs/develop/create-sso-office-add-ins-aspnet.md ✅Succeeded View
docs/develop/create-sso-office-add-ins-nodejs.md ✅Succeeded View
docs/develop/debug-office-add-ins-in-visual-studio.md ✅Succeeded View
docs/develop/dialog-handle-errors-events.md ✅Succeeded View
docs/develop/enable-nested-app-authentication-in-your-add-in.md ✅Succeeded View
docs/develop/referencing-the-javascript-api-for-office-library-from-its-cdn.md ✅Succeeded View
docs/develop/specify-office-hosts-and-api-requirements-unified.md ✅Succeeded View
docs/develop/specify-office-hosts-and-api-requirements.md ✅Succeeded View
docs/develop/support-ie-11.md ✅Succeeded n/a (file deleted or renamed)
docs/develop/xml-manifest-overview.md ✅Succeeded View
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@AlexJerabek AlexJerabek merged commit 7f459a0 into main Nov 11, 2025
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@AlexJerabek AlexJerabek deleted the AlexJ-Trident branch November 11, 2025 23:16
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