Enabling this option switches the browser used for SSO login in the mobile app from "the browser within the Teachme series app" to "the device's default browser (such as Chrome or Safari)."
If Microsoft Intune or similar solutions restrict the authentication browser to an external browser, authentication may not complete in the in-app browser, preventing login.
In that case, please Enable this setting.
Note that this does not affect SSO login via the web browser version (PC) or mobile browser.
Reference: Single Sign-On in the mobile app will be unified to use an external browser for login | Planned from January 2027 onwards
https://help.teachme.jp/hc/en-us/articles/63012426278169