How to fix error “Cannot invite existing user” in Multilogin 6
⚠️ Still using Legacy Multilogin 6? You are missing the good stuff!
The new Multilogin lets you run browser profiles and Android cloud phones in one workspace – manage desktop and mobile accounts without extra tools or devices.
⚡ Want to join the migration queue? Download the latest Multilogin 6 version (scroll to the bottom of the page), open it and click “Migrate”.
- 🖥️ Better workspace: Web interface • Desktop app • Dark mode • 2FA
- 🧑💻 Mobile + browser accounts together: Android cloud phones • Mimic and Stealthfox browsers
- 🌐 Faster setup: Profile and proxy templates • Extension manager
- 💾 Flexible profile storage: Local profiles • Cloud profiles • Storage converter
- ⚡ Productivity tools: Profile folders & tags • Column manager • Running profiles manager • Trash bin • Copy profile ID
- 🤖 Automation ready: API access in all plans • Selenium / Puppeteer / Playwright support • CLI tool • Script runner
👉 Curious what else changed? Read New Multilogin version: how is it different from Multilogin 6.
Seeing this error when trying to invite a team member?

It pops up because the email address you’re trying to invite is already registered in Multilogin. Here's how to fix the issue ⬇️
Option 1: use a different email address
Ask the team member to provide an alternate email address they can access. This email can be a personal one, a work email, or any unused email that’s not currently linked to Multilogin.
Proceed with the invitation using this alternate email.
Option 2: use an email alias
If the original email is [email protected], you can modify it by adding a “+” and extra text before the “@” symbol, like [email protected] or [email protected]. Most email providers (like Gmail) treat aliases as the same email, so the invitation will still arrive in [email protected].
The team member can then accept the invite without needing to create or manage a new account.
This trick works with Gmail and some other email providers. If unsure, test the alias first by sending a quick test email.