Please login to user portal (my.transoftsolutions.com) with admin account and under Admin -> Settings toggle the setting Enable Azure AD SSO.
It is possible that you might not be able to turn that option on and that you will receive this error:
"The authenticated Azure Active Directory organizational account does not have an associated my.transoftsolutions.com user."
Usually that means that the Windows User you are logged into in your browser does not match the email address in the portal.
In order to fix the problem, please use this URL to log you out of your Microsoft Account in the browser:
After that try to toggle ‘Enable Azure AD SSO’ in user portal. You will get redirected to your Microsoft account login page. Log in to Microsoft with the same email address that you are using in the portal and the setting will be enabled for all users in your company.