In Webex, you can invite others to join your universal channel by sharing the link that the bot generates after you create the channel.
Learn how to create a universal channel by following this article first.
Retrieving the invite link & inviting by email
Open the direct message you have with the Mio bot and send the command "channels".
In the drop down, find the channel you want to view the details of and select View.
A new message with your channel details will appear.
Copy and share this link with any external contact. You can also send a direct email invite to your contact's inbox without leaving Slack.
Your external contacts will be asked to install the app on their own chat platform, whether it's Slack, Microsoft Teams, or Webex.
Do Webex users need to join from that link as well?
If your colleagues are in the same Webex organization as you, you can invite them to your universal channel as you normally would in a regular space.
In your People tab, add colleagues by name or email.
Note: External contacts on other platforms won't show in the People tab. Learn how to view all the members of a universal channel by following this article.