Cannot open documents of Sharepoint in browser - sharepoint

I have a Sharepoint 2019 on a Windows Server 2016 and cannot open office documents on the browser, it just download them.
I read that I have to install an Office web apps but I searched and did not found information about it.
Any help?
Thanks!

It's now called the Office Online Server. You install it on its own server and then link it to your SharePoint 2019 server.
https://learn.microsoft.com/en-us/officeonlineserver/office-online-server
Depending on your Microsoft subscriptions, it's downloadable from the Volume Licensing Service Center (VLSC) or your MSDN downloads.

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Cannot open office apps in web browser mode from SharePoint

I've installed Microsoft office web apps offline in the VM and also Installed SharePoint 2016 in another VM machine. Both VMs are connected to the domain.
Besides, I've successfully connected SharePoint to the office farm. But when I try to open docx files or any other office app on the web browser I get the below error :
Failed to launch 'ms-word:ofv%7Cu%7Chttp://....' because the scheme
does not have a registered handler.
Based on the error that you have screenshoted, the Application falied to launch the MS Word Desktop Client because the scheme "ms-word" does not have a handler registered, which in simple terms means that there isn't any associated app to execute when the beforementioned scheme is used and in order to have the scheme registered with an application, you would have to install Microsoft Office on the machine that you are using to view the SharePoint Site.
Here is the link to the documentation where is states that the scheme handlers are registered upon the installation of Microsoft Office.
The following is the list of scheme names implemented in Microsoft Office applications. When Microsoft Office is installed, each scheme name is registered with Windows to be handled by the Office product of the same name. Note that "ms-spd" is an abbreviation for SharePoint Designer.
ms-word:
But in order to use the Web counterparts of the Office apps, like Word or Excel in the browser, there is a different procedure where it is required of you to Install a Office Online Server and enable communication with SharePoint Server.
As it is written in the overview of the product...
Office Online Server delivers browser-based versions of Word, PowerPoint, Excel, and OneNote. A single Office Online Server farm can support users who access Office files through SharePoint Server, Exchange Server, shared folders, and web sites.
Since it's a lengthy procedure and there are different prerequisites in term of licensing and other matters, you can check out this link (Configure Office Online Server for SharePoint Server) on the topic and decide which features you are looking for.

"Your administrator has not installed Web Add-ins for your organization" when try to add Office Add-in for SharePoint 2016 + Office Online Server

My environment:
1st VM/server: Active Directory Domain Controller
2nd VM/server: SharePoint 2016 On-Premises
3rd VM/server: Office Online Server (old Office Web Apps) also
On-Premises - version from November 2017
Done already:
Communication between SharePoint and OOS. I have also custom Office Excel Add-in uploaded to Apps for Office list in App Catalog site. Add-in itself should be fine - it works in other environment.
Issue:
When I try to install add-in in Excel in web/browser, I'm getting "Your administrator has not installed Web Add-ins for your organization" message:
screenshot
I have got also uploaded Office Excel Add-in to Apps for Office list in App Catalog, and it still does not work. Did I miss something in the configuration to allow adding custom add-ins?
I suppose a sharepoint catalog and app store add-ins are mixed in you post.
Instead of uploading the add-in Office 365, under Setting>Service & add-ins, try uploading the add-in in SharePoint Online Add Catalog site. To do this, please follow the steps below:
Sign in to Office 365 portal with admin credentials.
Go to Admin Center>SharePoint Online Admin Center.
Once you are in SharePoint Admin center, go to App Catalog site, URL should be something like https://tenant.sharepoint.com/sites/AppCatalog
Click Apps for Office on the left navigation panel to upload the add-in for Office apps.
Click Upload and browser the path where the custom add-in is saved on your system.
See Excel does not show Office 365 custom add-in for more information

SharePoint 2016 and OneDrive On-Premise - move files from OneDrive to SharePoint libraries

Background:-
We have got a SharePoint 2016 On-Premise and we have setup MySites (which has OneDrive as a feature).
What are we after:-
Like in Internet Explorer users can open up Windows Explorer via a Library, we are looking at a similar option on MS Edge. Some articles suggest we can achieve it via OneDrive. Can someone throw some light on this as to how we can get a similar functionality?
Please note that most articles refer to Microsoft 365 and we are not yet there.
Thanks,
Sam
Enable and use IE Mode in Microsoft Edge to make the open with explorer works again in SharePoint server 2016, for detailed steps, please refer to this simialr issue:
https://learn.microsoft.com/en-us/answers/questions/520044/how-will-the-open-with-explorer-function-be-replac.html

How to deploy officeJS addin on office online on-premise server?

I have written a small officeJS addin for excel which run perfectly on desktop excel client. Also office online from onedrive gives an option of installing the addin from the ribbon menu. I want to use this officeJS addin to run on either of the following configuration:
On premise office online server configured with on premise
sharepoint server.
On premise office online server with my own
implementation of wopi host.
How to deploy an officeJS addin on office online on premise server which is preferably managed centrally by the administrator.
Also why is the add-ins option is not available on the office online configured with sharepoint, pfa image:
office online onedrive v/s office online onprem with sharepoint
Thank You
The Office Online Server currently doesn't enable Office store by default. As part of the configuration, you'd have to enable it. I'm not 100% sure about the exact setting. It may be this: set the AllowExternalMarketplace flag to true.
More here
Try this. On a server in the farm, open the SharePoint Management Shell (PowerShell). Run this command:
Set-OfficeWebAppsFarm - OfficeAddinEnabled:$true
You probably have to be logged in as a farm administrator.
There is some documentation here: Set-OfficeWebAppsFarm

Office Web Apps Server 2013 without SharePoint

I've noticed Microsoft has released a new version of Office Web Apps Server 2013, which is a standalone product now.
I'm looking for an engine that I can convert Word/Excel and PowerPoint documents into web-friendly versions (HTML5) for an application I've built that uploads these documents to S3 and I thought Office Web Apps Server 2013 standalone would work.
I don't want to use Google Docs, but rather use a solution that I'm hosting myself.
Reading the Office Web Apps Server documentation, it doesn't specify whether or not I need to have a SharePoint server license. I've tried deploying Office Web Apps Server on a Windows 2012 server on Microsoft Azure, and while the software installs, it is unable to render any documents that I'm pointing to it from an external URL (a publicly accessible S3 bucket).
Does anyone know the particular requirements of Office Web Apps Server 2013 to work properly? The website does state that it can be used to view documents from an external URL which is how I'm trying to use it. But since its a new product, there isn't that much information I was able to find on it other than Microsoft's deployment instructions.

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