"ADXTaskPane" popping out of outlook main window

Symptom:

Whenever Outlook is opened, the Azure Information Protection (AIP) toolbar pops up in another window named as "ADXTaskPane" other than Outlook windows. Which will look something like following:

 

When you put your Mouse cursor on the Outlook icon in the Windows Taskbar you can see something like following:

Cause:

This issue is related with Azure Information Protection (AIP) Toolbar compatibility.

Solution:

In Order to resolve the above issue, you can follow the following steps:

1. Open the Office Application (Here it is Outlook) and navigate to File > Options > General > User Interface optionsYou can see the following option selected:
   
2. Select Optimize for compatibility (application restart required)
3. Restart Office Applications i.e Outlook and other office apps.
4. Now Verify the issue will be fixed.