I have ever helped customer admin to process that in Webex CH:
Phase one:
Verify Domain - faster process in user creating /active Claim Users - help customer to put all the relevant account under their orgClaim Domain - easy way to help on claim us...
For online account (*.my.webex.com),please refer to
https://help.webex.com/en-US/article/WBX000028154/How-Do-I-Update-the-Credit-Card-Payment-in-Control-Hub?
if you are on CCE order portal, please refer to 'Update Payment Method' on below
http...
