I am trying to Install ArcGIS Web Adapter 10.5.1 on Window Server 2012 R2 but its allow to Install on one webadapter.
When trying to Install second Web Adapter on same machine its not allow to Install , Its given only Modify or Remove window. not moving to install second web adapter for Server or Portal, Its strange behavior.
Please suggest .
You can try to make an installation from the command line, you only have to indicate the website, the port, the path where the installers are located and the Web Adaptor name.
setup.exe /qb VDIRNAME=arcgis WEBSITE_ID=1 PORT=443