Salesforce1 - Switch Login servers
|Knowledge Article Number||000187717|
By default, Salesforce1 is set up to connect to your production environment. If you want to connect Salesforce1 to your sandbox environment for testing purposes, redirect to a single sign-on location, or login using a Community URL you can configure the app to point to a different page during login.
To Change the login host on Apple iOS:
To Change the login host on Android:
Option 2 (My Domain and iOS Only)
On the login screen tap the link “log in to custom domain”. Then enter the name of your My Domain. If your full domain is company.my.salesforce.com, you only need to enter the word company.
Note: This is temporary and needs to be repeated each time you log in. To create a new instance that is permanent use option 1
IMPORTANT NOTE : Please ensure Community URL or Custom Domain URL are Case Sensitive, and entered exactly as they are in your Org set up, otherwise you will return an error (ie: this site is under construction, cannot be found, etc )