Multi tenant web path

Hi all,

If I have crmserver with multi tenants i.e http://crmserver/1, http://crmserver/2, http://crmserver/3

Where in IIS web app I can see the mapping of path /1 to tenant 1   /2 to tenant 2 ?

The reason I asked because I couldn't login to tenant 1, but I can login to tenant 2. Using the same user. 

XrmToolbox can login to both.

Thanks