Sign in with Xero lets you log in to Seamlss with your Xero login. It works when your Xero login uses the same email as your Seamlss user.
In Seamlss: Sign in with Xero, on the Seamlss login page.
Open the login pageSign in #
Select Sign in with Xero
It’s under the Log in button.

Log in to Xero if asked
If you’re already logged in to Xero, this is skipped.
Allow access the first time
Xero asks you to give Seamlss permission. You only do this once.
Does it count as a secure login? Your firm can turn on Enforce Secure logins under Settings, Users. Staff then need an authenticator app, or Sign in with Xero, to log in.
Something not working? #
It won’t let me in
Your Xero login probably uses a different email from your Seamlss user. Use the same email in both, or log in with your Seamlss email and password.
I don’t have a Seamlss account yet
Sign in with Xero only works for an account that already exists. Register your firm first, then link Xero. Joining a firm that already uses Seamlss? Ask its admin to add you.
Still stuck? Contact support and tell us what you see.