We are now able to use Custom URLs for our Moodle tenants. However, these custom URLs are not given in the confirmation email when a user is uploaded via CSV.

When we manually add a new single user from Users > + New user that user will receive a confirmation email containing their login information, as well as the new Custom URL for that tenant Eg below:

To start using 'Tenant Name', log in at
https://customurl.ac.uk/login/?lang=en_wp

When we upload users via csv, they instead receive the following:

To start using 'Moodle Workplace', log in at
https://defaulturl.ac.uk/login/?lang=en_wp

The "Moodle Workplace" is the name of the Moodle site, not the tenant, and the url for the second user is the normal, default URL.

We use SAML2 and SSO for our main Tenant, however, all the others primarily upload their users via CSV. Also, almost all the tenants look forward to being able to use custom URLs for their tenants. However, when they upload their users, they won't actually get the custom URL in their email - and could potentially stay in that incorrect URL environment for their whole Moodle experience.

In the language packs, it looks like there's only one string for the confirmation email, our provider likened uploading users to asking Moodle to add them, not the user themselves, so Moodle doesn't actually know what tenant to send the email from (even though it knows which tenant to add them to).