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OWA Add-ins Cannot Restore Sessions Across outlook.office.com ↔ outlook.cloud.microsoft

Needs: triage 🔍New issue, needs PM on rotation to triage ASAPNew issue, needs PM on rotation to triage ASAP

Status: Open.

#6598 In OfficeDev/office-js;

· mikhalonok opened on Mar 24, 2026

Office Desktop Add-ins menu stuck loading (empty store) for work accounts, blocking sideloading of localhost add-in

Area: WordIssue related to Word add-insIssue related to Word add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Status: Open.

#6597 In OfficeDev/office-js;

· A-Glazer opened on Mar 24, 2026

Word annotations inserted from ribbon-opened task pane are not visible (reproduced on Mac and Windows)

Needs: triage 🔍New issue, needs PM on rotation to triage ASAPNew issue, needs PM on rotation to triage ASAP

Status: Open.

#6595 In OfficeDev/office-js;

· dmytrokachurynets opened on Mar 23, 2026

Function Wizard: XLL HelpTopic poisons helpUrl for Office.js custom functions

Area: add-ins platformIssue related to the add-ins platformIssue related to the add-ins platform

Area: custom functionsIssue related to the Excel custom functions featureIssue related to the Excel custom functions feature

Area: ExcelIssue related to Excel add-insIssue related to Excel add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Platform: Desktop

Type: product bugBug in the Office Add-ins platform or Office JavaScript APIsBug in the Office Add-ins platform or Office JavaScript APIs

Status: Open.

#6594 In OfficeDev/office-js;

· sdergunov opened on Mar 20, 2026

Office.context.urls is null in the JavaScript runtime in Classic Outlook (current channel)

Area: Common APIsIssues related to common apisIssues related to common apis

Area: OutlookIssue related to Outlook add-insIssue related to Outlook add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Platform: Desktop

Possible-Solution

Similar-Issue

Type: product bugBug in the Office Add-ins platform or Office JavaScript APIsBug in the Office Add-ins platform or Office JavaScript APIs

Status: Open.

#6592 In OfficeDev/office-js;

· DustinBrungart opened on Mar 20, 2026

Microsoft Phishing Test Emails do not show the right email headers in View Message Details.

Area: DevXIssue is related to Developer Experience (DevX)Issue is related to Developer Experience (DevX)

Area: OutlookIssue related to Outlook add-insIssue related to Outlook add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Type: product bugBug in the Office Add-ins platform or Office JavaScript APIsBug in the Office Add-ins platform or Office JavaScript APIs

Status: Open.

#6591 In OfficeDev/office-js;

· glr0221 opened on Mar 20, 2026

insertContentControl() breaks saving in Word for the Web and cannotEdit disables Table Styles on Desktop

Area: WordIssue related to Word add-insIssue related to Word add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Possible-Solution

regressionFunctionality that previously worked no longer worksFunctionality that previously worked no longer works

Similar-Issue

Status: Open.

#6590 In OfficeDev/office-js;

· nickamckenna opened on Mar 19, 2026

Excel spawns duplicate add-in instances within a single desktop session

Area: custom functionsIssue related to the Excel custom functions featureIssue related to the Excel custom functions feature

Area: ExcelIssue related to Excel add-insIssue related to Excel add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Status: Open.

#6588 In OfficeDev/office-js;

· tobz1000 opened on Mar 18, 2026

EXCEL > Issues with Office Add-in Catalog Loading/Add/Remove addins

Area: add-ins platformIssue related to the add-ins platformIssue related to the add-ins platform

Area: ExcelIssue related to Excel add-insIssue related to Excel add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Possible-Solution

Similar-Issue

Status: Open.

#6587 In OfficeDev/office-js;

· demyte opened on Mar 18, 2026

Add-ins for Outlook Dialog not loading addins information in OWA (inclientstore)

Area: add-ins platformIssue related to the add-ins platformIssue related to the add-ins platform

Area: OutlookIssue related to Outlook add-insIssue related to Outlook add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Platform: OnlineIssues occurred on online platformIssues occurred on online platform

Possible-Solution

Similar-Issue

Type: product bugBug in the Office Add-ins platform or Office JavaScript APIsBug in the Office Add-ins platform or Office JavaScript APIs

Status: Open.

#6586 In OfficeDev/office-js;

· avisheknand opened on Mar 18, 2026

Invalid or Timed Out Session error after laptop sleep causes data loss in Excel add-in

Area: ExcelIssue related to Excel add-insIssue related to Excel add-ins

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Status: Open.

#6585 In OfficeDev/office-js;

· Zzzhifa opened on Mar 18, 2026

Fail to install/remove an Office.js addin

Area: add-ins platformIssue related to the add-ins platformIssue related to the add-ins platform

Needs: attention 👋Waiting on Microsoft to provide feedbackWaiting on Microsoft to provide feedback

Platform: Desktop

Type: product bugBug in the Office Add-ins platform or Office JavaScript APIsBug in the Office Add-ins platform or Office JavaScript APIs

Status: Open.

#6584 In OfficeDev/office-js;

· orinabzai opened on Mar 16, 2026