AppExchange app is not working post changing the email ID with app provider
|Knowledge Article Number||000232627|
|Description||Some times users will change their email ID with the subscribed AppExchange app/provider due to various reason (Ex: created new email ID or package upgrade). As soon as an email changed with the app provider, installed package in Salesforce may not work due to user authentication.|
|Resolution||To resolve this issue, users has to change their email ID in Salesforce with the new email ID which is updated with the app provider. Both the email IDs in Salesforce and App provider has to be same to make the app work in Salesforce.
Refer this article to know how to change the email ID in Salesforce:
Email update not reflected in User Record