An Insightly URL is a unique web address you can create for your users to bookmark and sign in from.
The last part of this address is always .insight.ly but you can change the first part to something your users will remember, like http://mycompany.insight.ly. You can use any name that hasn't already been reserved.
Set it up on the System Settings > Insightly URL page.
Your Insightly URL must contain only the characters A-Z or a-z, the numbers 0-9, or the hyphen character. No spaces are allowed and it must include at least 5 characters.
If you later change your Insightly URL, be sure to share it with your users so they can continue to access Insightly.