This is the final reminder for the EU6 instance refresh happening on January 19, 2019. Following the instance refresh, your instance will change to UM4, and will be served from our data centers in London, UK (North) and London, UK (West). For more details, review the article, Where is my Salesforce instance located?
NOTE: UM4 will be on the same release and system maintenance schedule as your current instance.
Enable My Domain & Remove Hard-Coded References: Remove any hard-coded references by updating them to the subdomain that you created with My Domain. If you have not already implemented My Domain, we highly recommend you do so prior to the migration. NOTE: Not all hard-coded references are automatically updated upon enabling My Domain. Review the Updating Hard-Coded Referencesarticle and the My Domain documentation for more information.
Whitelist All Salesforce IP Ranges: If your corporate network settings or email security filters restrict access to IP ranges or data centers, please ensure that you include our current ranges. We last made updates to this article in December 2018.
Prepare to Refresh Integrations: If you experience integration issues following the migration, be prepared to refresh your integrations.
Prepare to Refresh your DNS cache: If you continue to see a "Maintenance in Progress" alert following completion of the maintenance, you may need to refresh your DNS cache.
Subscribe to Trust Notifications: If you’re already subscribed to Trust Notifications for your current instance, you will automatically be subscribed to both UM3 and UM4. After the Instance Refresh, you may want to unsubscribe from the instance not applicable to you. To learn more about what Trust Notifications are and how to subscribe, review the Trust Notification User Guide.