Once After you created create a join token, you can modify only the tags that are associated with the token. You it; you cannot modify the its name or description.
To edit a join token, do the following:
Log in to the Infoblox Portal.
Go to the Configure > Administration > Join Tokens page.
On the Join Tokens page, select the checkbox of the join token you want to configure, and then click Edit.
...
In the Edit <Join Token> dialog, edit the tags you have configured. For details, see Managing Tags.