Product:
Cognos TM1 9.5

Symptom:
After installing a new TM1 instance – the new TM1 server is not shown in the drop down list for the TM1Web login. It only shows the login dialog for user name and password.

Cause:
The web.config file in the tm1web folder is configured to only talk to one tm1server.

Solution:
Open the web.config file from folder
C:\Inetpub\wwwroot\TM1Web
Search the file for TM1ServerName (it is close to the end of the file)

Change the line from
<add key=”TM1ServerName” value=”tm1servername” />
to this
<add key=”TM1ServerName” value=”” />
save the file.

Then surf to the TM1web and select the server you want to login to from the list.