Microsoft releases new Office Build 12325.20012 to Office Insiders, here is what’s new

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Microsoft has released a new Office Build for Office Insiders on Windows. The new Build 12325.20012 has introduced a couple of new features to Outlook. Another new feature is the ability to switch between multiple panes using a tab UI on the right-hand side of the Office Suite app. Aside from that, it brings plenty of bug fixes. You can read the official changelog below.


Feature updates


  • Advanced group email settings: This feature helps groups users to customize which emails or events to receive/follow in their inbox.
  • Groups Naming policy: A group naming policy enables the IT admin to standardize and manage the names of groups created by users in the organization. The admin can require a specific prefix and suffix be added to the name for a group when it’s created, and can block specific words from being used. This helps minimize the use of inappropriate words in group names as well as IT manage the representation of groups in their directory. Naming Policy also helps organizations that deploy team sites to categorize them based on department.

Office Suite

  • Tabbed Panes: Now you can switch between multiple panes using a tab UI on the right hand side of the app. The UI will only be visible when you have 2+ panes open.

Resolved issues


  • Users may encounter an error when saving changes while using some non-English character sets.
  • Users may encounter an error when accessing a hidden named range.
  • Disabling hardware graphics acceleration with 4K resolution may result in delayed rendering of cells when scrolling around.
  • Clearing a long formula that overlaps a cell boundary may still display across the cell boundary.
  • Resolved an issue with ribbon customization not loading when opening embedded workbook.
  • Margin dropdown menu may not render correctly.


  • OneNote may not open via the ‘Meeting Notes’ Outlook add-in.


  • Retention policy labels may display the retention time period in parenthesis.
  • Blank spaces may appear in Contact cards with Japanese language pack.
  • Images inserted inline to Outlook e-mail messages can sometimes get resized.


  • If a user has two (or more) different videos on a slide in a cloud file, the video images are rendered correctly, but when the user clicks on each one to play, the video content is the same.
  • In some cases, scrolling with touch devices will not work.
  • Margin dropdown menu may not render correctly.
  • Safelinks from one Office application to another may not launch the linked application.


  • Project may crash when you use the Compare Projects feature.
  • If you are in Dark mode, when you go to the task inspector panel on a task with an over allocated resource, you are unable to read the table.
  • Setting effort on tasks that have no assignments are rounded to 1 day.


  • Saving a file after doing a mail merge may not work under certain conditions.
  • Building blocks organizer may display an invalid alert: “You have modified styles, building blocks”.
  • Comment pane sometimes gets reloaded when using copy/paste.
  • Comments are sometimes not pasted in the correct order.
  • Applying a template consisting of a multi-level list with custom styles to existing documents may not preserve the style under certain conditions.
  • Resizing a split screen border may introduce an additional split screen.
  • Margin dropdown menu may not render correctly
  • At-mentioning a user in a comment card may show JSON.
  • Safelinks from one Office application to another may not launch the linked application.

Office Suite

  • For Japanese based products, account user first name, last name may appear in incorrect order.
  • Hovering a mouse pointer over comments may display a textbox outline around the comment.

To update to the latest Office Insider Preview Build, open any Office program and go to File> Account> Update Options> Update Now.

More about the topics: Build 12325.20012, Office Build, Office Insider, Office Insider Build