The May security and rollup update has been made available for all Click-to-Run installations of Outlook 2016, Outlook 2019, Outlook 2021 and Outlook as part of a Microsoft 365 subscription.
It contains 1 security update for Excel.
In addition, it contains 4 non-security fixes related to Outlook Current Channel Version 2404, 11 fixes related to Outlook Monthly Enterprise Version 2403, 4 fixes related to Outlook Semi-Annual (Preview) Version 2402, and 1 fix related to Outlook Semi-Annual Version 2308.
- Version 2404
- We fixed an issue that caused Sovereign users to be unable to create ToDo tasks from Outlook.
- We fixed an issue that caused the first PolicyTip to take a long time to appear after starting Outlook.
- We fixed an issue where the app closed unexpectedly using the Scheduling Assistant when creating a new meeting or viewing an existing meeting.
- We fixed an issue that caused add-in developers to hit timeouts when retrieving notifications from an Outlook client context.
- Version 2403
- We fixed an issue that caused Outlook to exit unexpectedly when attaching an Outlook item from the Insert tab.
- We fixed an issue that affected all-day meetings with a reminder on the day of. The meeting did not open, and an error message was displayed.
- We fixed an issue where Office add-ins disappeared from the ribbon.
- We fixed an issue with user and shared mailboxes where a message sent from a user with saved to Sent Items folder enabled and where DelegateSentItemsStyle is set to 1 is saved in the shared mailbox Sent Items folder.
- We fixed an issue that caused some users to receive a Non Delivery Report when attempting to reply to or forward a message.
- We fixed an issue that prevented users from receiving emails created using Mail Merge. (Word)
- We fixed an issue where a mandatory sensitivity label was not applied or prompted for if an email was sent from the Drafts-folder. (Office)
- Version 2403 and Version 2402
- We fixed an issue that caused some users to see no search results in Org Explorer.
- We fixed an issue that caused Outlook to take longer to boot than expected.
- We fixed an issue that caused users with on premise mailboxes to see no web add-ins in Outlook.
- We fixed an issue where the older format of an add-in was being launched instead of the newer format whenever a user tried to run the add-in from an Actionable Message.
- Version 2308
- We fixed an issue in Insert Object for Outlook. (Word)
Based on your release channel, you’ll be updated to the following version;
- Microsoft 365 Apps, Outlook 2016 Retail, Outlook 2019 Retail, Outlook 2021 Retail
Version 2404 (Build 17531.20152) - Monthly Enterprise
Version 2403 (Build 17425.20236)
Version 2402 (Build 17328.20346) - Semi-Annual Enterprise (Preview)
Version 2402 (Build 17328.20346) - Semi-Annual Enterprise
Version 2308 (Build 16731.20674)
Version 2302 (Build 16130.20990) - Outlook LTSC 2021
Version 2108 (Build 14332.20706) - Outlook 2019 Volume Licensed
Version 1808 (Build 10410.20026)
Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook itself or the Microsoft Store. This update does not apply to msi-based installations of Office 2016.
