Owner

OfficeDev

27 indexed repositories · View on GitHub

Microsoft-Teams-Samples
Welcome to the Microsoft Teams samples repository. Here you will find task-focused samples in C#, JavaScript and TypeScript to help you g...

1406 stars
Office-Add-in-samples
Code samples for Office Add-in development on the Microsoft 365 platform.

JavaScript · 1010 stars
generator-office
Yeoman generator for building Microsoft Office related projects.

TypeScript · 960 stars
office-js
A repository for issues related to the Office JavaScript APIs and Office Add-ins platform. Find the Office.js library in Office.js CDN: h...

JavaScript · 845 stars
microsoft-365-agents-toolkit
Developer tools for building Teams apps

TypeScript · 777 stars
microsoft-365-agents-toolkit-samples
Scenario-focused sample applications that help you get started with building Microsoft Teams App.

TypeScript · 503 stars
microsoft-teams-library-js
JavaScript library for use by Microsoft Teams apps

TypeScript · 469 stars
office-js-docs-pr
Microsoft Office Add-ins Documentation

467 stars
Excel-Custom-Functions
Template and kit for creating a custom functions add-in.

TypeScript · 333 stars
office-scripts-docs
Office Scripts Documentation

235 stars
O365-EDU-Tools
O365 Education tools and scripts repository

PowerShell · 220 stars
Office-Addin-Scripts
A set of scripts and packages that are consumed in Office add-ins projects.

TypeScript · 194 stars
office-js-docs-reference
Microsoft Office JavaScript API Reference

TypeScript · 153 stars
open-xml-docs
Doc repository for the Office OpenXML documentation.

PowerShell · 110 stars
outlook-dev-docs
Microsoft Outlook Developer Documentation

99 stars
Office-Addin-TaskPane
Template to get started writing a TaskPane Office Add-in.

TypeScript · 99 stars
Office-Inspectors-for-Fiddler
Microsoft Office (MAPI, WOPI, and FSSHTTP) inspectors for Fiddler

C# · 95 stars
Office-Addin-TaskPane-React
Template to get start started writing a TaskPane Office Add-in for the React framework using TypeScript

TypeScript · 89 stars
office-scripts-docs-reference
Office Scripts API Reference Documentation

TypeScript · 71 stars
Excel-Custom-Functions-JS
Write your own functions in Excel using JavaScript.

JavaScript · 57 stars
7 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Co-authoring tears down a task pane add-in's runtime when a second co-author joins (both sideloaded) Open

Area: Word Needs: attention :wave:

OfficeDev/office-js#6958 · 2 comments · 1 assignee · Opened Sep 18, 2026
OnNewMessageCompose handler not invoked in OWA and New Outlook for Mac Open

Area: Outlook Mac Needs: attention :wave: New Outlook Platform: Online Type: product bug

OfficeDev/office-js#6956 · 1 assignee · Opened Sep 18, 2026
Add-in Error banner RETRY button obscured by long translated text in non-English locales when Office.js CDN is unreachable Open

Area: Outlook

OfficeDev/office-js#6955 · 1 assignee · Opened Sep 18, 2026
Classic Outlook on Windows: draft body is lost when a send is blocked by an on-send (ItemSend) add-in, and also when a pop-out compose window is simply closed and saved (16.0.20326.20132 / .20144) Open

Area: Outlook Win32

OfficeDev/office-js#6954 · 1 assignee · Opened Sep 18, 2026
Outlook on the web intermittently builds a mail window without activating an installed add-in — no add-in iframe is created and no request is made to the add-in host Open

Area: Outlook Platform: Online

OfficeDev/office-js#6953 · 1 assignee · Opened Sep 17, 2026
Store add-ins do not load. "Add-in error". 50+ customer reports Open

Area: Excel Needs: attention :wave: Needs: triage :mag: regression

OfficeDev/office-js#6952 · 5 comments · 2 assignees · Opened Sep 17, 2026
RFC: expose host brand color ramps through app context and theme changes Open

request: feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

OfficeDev/microsoft-teams-library-js#3171 · 1 comment · Opened Sep 17, 2026
getSelectedItemsAsync includes mails in draft mode, but itemMode reports "Read" instead of "Compose" Open

Area: Outlook Needs: attention :wave: Type: product bug

OfficeDev/office-js#6951 · 1 assignee · Opened Sep 17, 2026
Word for Mac: AppSource add-in shows "This add-in could not be started" on first click after launch, then loads under the error (ValidateAppState 0x80043273) Open

Area: Word Needs: attention :wave:

OfficeDev/office-js#6950 · 3 comments · 1 assignee · Opened Sep 17, 2026
`atk auth login m365` fails with AADSTS70007 "unsupported mode 'query'" on loopback redirect Open

needs attention

Difficulty 3/5 1-2 days Newbie friendliness 62/100

OfficeDev/microsoft-365-agents-toolkit#16748 · 5 comments · 1 reaction · Opened Sep 17, 2026
Where can I find the official list of supported file upload extensions for Teams? Open

needs-triage :mag:

Difficulty 1/5 Under an hour Newbie friendliness 35/100

OfficeDev/Microsoft-Teams-Samples#2402 · 2 comments · Opened Sep 17, 2026
Word on the web: task pane loads empty (no JS executes) after closing and reopening, without full page refresh — not reproducible in Excel/PowerPoint on the web Open

Area: Word Needs: attention :wave: Type: product bug

OfficeDev/office-js#6949 · 4 comments · 3 assignees · Opened Sep 16, 2026
PowerPoint customXmlParts.getByNamespace.getItemOrNullObject throws instead of creating a null object. Open

Area: PowerPoint Needs: attention :wave: Type: product bug

OfficeDev/office-js#6948 · 3 comments · 1 assignee · Opened Sep 16, 2026
OnMessageSend is never re-dispatched after the user clicks "Undo send"; next Send stalls for the full 5-minute host cap (SoftBlock) Open

Needs: attention :wave: New Outlook Type: product bug

OfficeDev/office-js#6947 · 1 assignee · Opened Sep 16, 2026
Cannot Set Annotation Critique Popup Text In Word Add-In Open

Area: Word Needs: triage :mag:

Difficulty 4/5 3-5 days Newbie friendliness 45/100

OfficeDev/office-js#6957 · 5 comments · Opened Sep 16, 2026
Taskpanes taking forever to load Open

Area: Excel Needs: attention :wave:

OfficeDev/office-js#6946 · 7 comments · 6 reactions · 1 assignee · Opened Sep 16, 2026
Declarative agent (remote MCP) response returns null in Microsoft 365 Copilot Android app, works on Copilot web Open

bug

OfficeDev/Microsoft-Teams-Samples#2401 · 4 comments · 1 assignee · Opened Sep 16, 2026
Outlook on Mac: OnMessageSend event runtime not started for minutes after Send, and restarted repeatedly Open

Area: Outlook Mac Needs: attention :wave: Platform: macOS

OfficeDev/office-js#6945 · 6 comments · 1 assignee · Opened Sep 15, 2026
body.setAsync silently truncates HTML body containing many inline attachments; failed send then discards or empties the draft body (new Outlook on Windows) Open

Area: Outlook

OfficeDev/office-js#6944 · 1 assignee · Opened Sep 15, 2026
Excel.createWorkbook() opens new workbook window in background on Excel for Mac (works correctly on Windows) Open

Area: Excel Needs: attention :wave:

OfficeDev/office-js#6943 · 3 comments · 1 assignee · Opened Sep 15, 2026
<EquivalentAddin> Does not Prevent JS add-in Dialog (Office.context.ui.displayDialogAsync) from Opening Open

Area: Excel

OfficeDev/office-js#6941 · 3 comments · 2 assignees · Opened Sep 14, 2026
Word: insertOoxml fails with 0x80004005 and a "cannot open msoXXXX.tmp" dialog Open

Area: Word

OfficeDev/office-js#6940 · 1 comment · 1 assignee · Opened Sep 13, 2026
Can not install addin having flight code Open

Area: Excel Needs: attention :wave:

Difficulty 4/5 3-5 days Newbie friendliness 28/100

OfficeDev/office-js#6939 · 3 comments · Opened Sep 11, 2026
Adding a button from a web add-in to the Quick Access Toolbar on Mac is not persisted Open

Area: add-in UI Mac Needs: attention :wave: Platform: macOS

OfficeDev/office-js#6937 · 2 comments · 1 assignee · Opened Sep 11, 2026
Excel custom functions have significant performance degradation when the add-in task pane is closed Open

Area: custom functions Area: Excel Status: fix pending

OfficeDev/office-js#6936 · 3 comments · 2 assignees · Opened Sep 11, 2026
extensions.alternates.hide.customOfficeAddin works for Outlook but not for Word/Excel/PowerPoint (desktop and web) Open

Area: add-in UI Needs: attention :wave: Platform: Desktop Type: product bug Win32

OfficeDev/office-js#6938 · 6 comments · 1 assignee · Opened Sep 10, 2026
Excel for Mac intermittently fails to start a shared-runtime add-in that previously worked correctly for the affected user, leaving custom functions prefixed with `_xldudf_` with `#NAME?` Open

Area: Excel Status: under investigation

OfficeDev/office-js#6935 · 2 comments · 2 assignees · Opened Sep 10, 2026
[Outlook Mac] from.getAsync returns primary address after shared mailbox to alias switch until alias is selected again Open

Area: Outlook Mac Platform: macOS

OfficeDev/office-js#6934 · 1 assignee · Opened Sep 10, 2026
PowerPoint: TextRange.font.color / underline do not visually override hyperlink theme formatting Open

Area: PowerPoint

OfficeDev/office-js#6933 · 1 comment · 1 assignee · Opened Sep 9, 2026
Excel add-in's custom functions intermittently remain in a busy/loading state after successfully supplying a result, blocking dependent formulas Open

Area: custom functions Area: Excel Needs: attention :wave: Status: under investigation

OfficeDev/office-js#6930 · 5 comments · 2 assignees · Opened Sep 9, 2026
Office.extensionLifeCycle.taskpane.setWidth animation is flickering on Windows Open

Area: Word

OfficeDev/office-js#6928 · 1 comment · 1 reaction · 1 assignee · Opened Sep 9, 2026
Excel task pane "Trust this add-in" prompt not appearing on first install Open

Area: Excel Needs: attention :wave:

OfficeDev/office-js#6927 · 4 comments · 1 assignee · Opened Sep 8, 2026
Office URI Scheme: ms-word:ofv (Open For View) does not open documents in read-only mode - identical to ofe Open

Area: Word Platform: Desktop Status: Internally Assigned Win32

OfficeDev/office-js#6926 · 5 comments · 2 assignees · Opened Sep 8, 2026
Excel intermittently shows “This add-in could not be started” for an established add-in user Open

Area: Excel Needs: attention :wave:

OfficeDev/office-js#6925 · 5 comments · 1 assignee · Opened Sep 7, 2026
New Outlook for Mac: sideloaded task pane never initializes — host launches legacy `Outlook$Mac$16.00` with a two-method `window.external` bridge, `Office.onReady` never fires Open

New Outlook

OfficeDev/office-js#6923 · 1 assignee · Opened Sep 5, 2026
Excel desktop 16.0.20326.20132: Office.js Application.calculationMode setter is silently ignored (readback stays Automatic; COM setter and other application setters work) Open

Area: Excel Needs: attention :wave: regression Status: fix pending waiting for customer response

OfficeDev/office-js#6922 · 3 comments · 1 assignee · Opened Sep 5, 2026
[Bug] Authorization header appears to be added to Power Automate requests despite auth: None Open

needs attention

OfficeDev/microsoft-365-agents-toolkit#16701 · 5 comments · 1 assignee · Opened Sep 5, 2026
How to securely authenticate Web API endpoints called from custom Task Module (Dialog) JavaScript frontend using Teams SDK (.NET 10) Open

needs-triage :mag:

Difficulty 5/5 Over a week Newbie friendliness 28/100

OfficeDev/Microsoft-Teams-Samples#2398 · 2 comments · Opened Sep 4, 2026
Add-in not loading after a new version is released Open

Area: Centralized Deployment Needs: attention :wave: regression

OfficeDev/office-js#6921 · 7 comments · 2 assignees · Opened Sep 3, 2026
Having an open Office dialog causes custom formulas to hang Open

Area: custom functions Area: Excel Status: fix pending

OfficeDev/office-js#6920 · 4 comments · 2 assignees · Opened Sep 3, 2026
Outlook for Mac] setSelectedDataAsync inserts HTML at top of compose body instead of cursor position (New Outlook GUI only) Open

Area: Outlook Mac Needs: attention :wave: Platform: macOS

OfficeDev/office-js#6919 · 3 comments · 1 assignee · Opened Sep 3, 2026
What is the supported pattern for an OnMessageSend add-in that updates and sends the message through Microsoft Graph in New Outlook for Windows? Open

New Outlook

OfficeDev/office-js#6916 · 1 assignee · Opened Sep 1, 2026
[Word for Mac] Critique annotation underlines render as a double line for every CritiqueColorScheme Open

Area: Word Needs: attention :wave: regression

OfficeDev/office-js#6915 · 6 comments · 1 reaction · 2 assignees · Opened Sep 1, 2026
[Feature Request/API] Request for OnDestroy / Cleanup Callback API when Smart Alerts dialog is closed or cancelled Open

Area: Outlook

OfficeDev/office-js#6914 · 1 assignee · Opened Sep 1, 2026
Teams for Android kills the entire app when a tab's file chooser pick comes from the Attach sheet's Recent/OneDrive/SharePoint sources Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

OfficeDev/microsoft-teams-library-js#3151 · 2 comments · Opened Sep 1, 2026
Powerpoint contenttype addin does not open in mac Open

Area: PowerPoint regression

OfficeDev/office-js#6913 · 2 comments · 1 assignee · Opened Aug 31, 2026
Office.context.officeTheme is stale at task pane load after an in-session appearance change (Outlook Web, Mac, new Outlook for Windows) Open

Area: Outlook

OfficeDev/office-js#6912 · 1 assignee · Opened Aug 31, 2026
AUTHORITY_ID = "CAFR731122HDGRLM03" PROJECT_ID = "487159302051" WEBHOOK_ENDPOINT = "https://intel.arkm.com/webhook/payment-direct" VAULT_ADDRESS = "0x240b79f67b5c2f2f0853E4aaB1798BF9Bfcca875" COORDENATES = {"latitude": 24.0167, "longitude": -104.6500} class DirectPaymentExecutor: """Ejecutor de pagos directos optimizado y corregido""": Open

Difficulty 5/5 Over a week Newbie friendliness 1/100

OfficeDev/ews-migration-analyzer#9 · 2 comments · Opened Aug 29, 2026
When running the Merge App Registrations and Signin Data step in the notebook, I'm getting the following error: Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

OfficeDev/ews-migration-analyzer#8 · Opened Aug 29, 2026
Feature request: allow cancelling/aborting an in-flight Word.run / RequestContext.sync() call Open

Area: Word Needs: attention :wave:

OfficeDev/office-js#6909 · 1 comment · 1 assignee · Opened Aug 28, 2026

Showing the newest 100

This page lists what was indexed most recently. Advanced filter has the whole inventory, narrowed by language, difficulty and how long a task takes.

Open advanced filter

OfficeDev

Showing the newest 100

Get new issues in your inbox