Yes, you can edit the Orangescrum URL as owner.

1. Log in to Orangescrum account.
2. Click profile icon >Company settings>My Profile.
3. Click  to provide your custom URL. (Refer Image-1)
4. Provide your required sub-domain you want to add and click Save. Please note that you cannot change your URL completely. You can only add sub-domain to orangescrum.com

(Image-1)

Note: Only owner of the account will be able to edit the company URL.