Installing Office Add-ins to Your Mailbox

2024-03-15

Use this link in the browser and it will open the Add-Ins section, where you'll be able to add the add-in from file.

https://aka.ms/olksideload

More details:

https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/sideload-outlook-add-ins-for-testing?source=recommendations&tabs=web#modern-outlook-on-the-web-and-new-outlook-on-windows-preview

2020-01-15 Step 1. Open any message and use ... link to expand the popup menu

Step 2. Scroll down the popup menu and click Get Add-Ins

Step 3. Choose My Add-Ins tab

Step 4. Scroll the page and click Add a custom add-in link

Step 5. Then proceed as described in the Single User Installation topic.

Legacy

Mail App for Outlook should be installed to activate the AddIn.

Note: If you are using desktop version of Outlook 2013 or 2016 you still have to do install via web interface (OWA). You can jump to the right place by choosing FILE > Info > Manage Add-ins.

Login to Outlook Online and go to Options section:

Choose General->Manage add-ins:

Choose Add->Add from a URL:

Set URL:

http://www.grinmark4u.com/download/RibbonOutlookPlugin.xml

And press Next:

Press Install to confirm that you trust this GrinMark add-on:

Press OK to finish installation:

New App shows up in the Apps list:

Now one may start using it by switching back to Outlook View: