Enabling Guest Login
Logging in as Guest User is turned off by default.
To enable the guest login to TeamCity:
Navigate to the Administration | Authentication page.
Select the Allow login as guest user option.
Save your changes.
The Log in as guest link appears on the Log in to TeamCity page.
By default, the guest user can view all the projects. To customize which projects guest user has access to:
Click the Configure guest user roles link to configure the Role and Permission. The link appears when the per-project authorization mode is enabled.