I have recently configure existing Office Webs to use SSL and https url. Our configuration is 1 SharePoint server and 1 SharePoint Web Apps.
In Office WebApps Server
Set-OfficeWebAppsFarm -InternalURL "https://contoso.com/" -ExternalURL "https://contoso.com/" -SSLOffloaded -certificate "contoso.com2022" -AllowHTTP:$True
It configured without any issues.
In SharePoint server.
Removed all exisiting binding
New-SPWOPIBinding -ServerName "CONTOSO.COM" -AllowHTTP
Set WOPI ZOne
Set-SPWOPIZone -zone "internal-http"
In the SharePoint site. When I tried to search any document with pdf, excel or word. It did not display preview and not error display as well. When I attempt to open any document, it downloaded the document instead preview in browser. Before configure using SSL and https, it working fine.
Anything that I missed?