Opening PDFs in browser instead of Word Online SharePoint 19 on Prem

Question

I'm having issues where pdf files added to a document library are opening up in Word Online instead of just the browser. Is there a way to set it up where .pdf files open in the browser and word documents to open in Word Online?

I am using SharePoint 2019 on-premise

I've added the pdf to the Mime Types using the PowerShell script below but the .pdf documents are still opening in word online.

$webApplication = Get-SPWebApplication("webapp URL")
$webApplication.AllowedInlineDownloadedMimeTypes.Add("application/pdf")
$webApplication.Update()

Answer 1

You can suppress the WOPI binding using New-SPWopiSuppressionSetting.

This will open the PDF in the method the browser is able to handle it, i.e. with non-IE browsers it will open with the browsers PDF handler. For IE when Acrobat is installed with it's ActiveX control, it should open in Acrobat.