Next cloud online document view

hello sir any one help me i create new nextcloud on my server , its working fine ,my requset is if i click document directly download , i check that internet it mention collabora only office ,but i face very default install only office , can you infor any easy method to acess the document office file online view


You need to have a OnlyOffice server to connect to your nextcloud.
You can find differents tutorials on the internet.
I folllwed this one :
I never tried but you have also the one click installation.