my zoho account have been created since 2013 which i was able to be part of the user with 25license user for free plus i also have 10 additional users i earned from people i reffered back then making 35 free user license to use for free.

but my problem now is that i want to use the multi domain features which simply means i will have to upgrade my plans. but i will like to know how this upgrade will affect my account, will i have to pay upgrade for all my users or how will my upgraded subscription be charged and affect my existing users and plans