Inviting customers to the app

You can email customers a link to the app with instructions to add it to their home screen; they sign in with the account they already have. Send to one from their client screen with the Invite button, or to many from the Invite customers screen reached off the Clients tab. Before mailing anyone real, send yourself a test: type any address into the test field and the preview goes straight there, so you can see exactly what a customer will get. If the address is left blank, or the server cannot send directly, it goes to your WHMCS system email admins instead, and the confirmation always tells you where it actually went. Bulk sending is deliberately cautious, because the thing that goes wrong here is mailing a lot of people something wrong or twice: it targets active customers by default, skips anyone already invited unless you tick to resend, and goes out in batches of up to a hundred so a large list does not overwhelm the mail server, with a count reported back each time. The email uses the app address from Branding if you set a custom one, and otherwise the module's own address. It is sent through the documented WHMCS mail, so it respects your mail configuration and appears in the client's email log.