Hi @RSMG Salesforce Center 

Good question.

This may be why…

Salesforce help articles: https://zapier.com/apps/salesforce/help

Error: "This connection to Salesforce appears to no longer be working"

If you run into this error this means your Salesforce account has exceeded the 5 connection app access limit. To resolve this, follow these steps:

1. Review your connected apps in Salesforce to make sure you have a token that you can use with Zapier.
2. Connect/reconnect your Salesforce account either within the Zap Editor or on your My Apps.

Connected app access limits to Salesforce

Salesforce allows a user to have 5 access tokens authorized to one Salesforce account to all third-party applications, including Zapier. After those 5 access tokens are generated, older tokens are automatically revoked without notification. This does not mean you're limited to only having five total Zaps using the Salesforce integration, just number of Connected App Access across all the third-party apps you use.

You can manage your connected apps access to directly in Salesforce and view your Zapier account connections which are called "Zapier CLI App".

Custom domains

Unfortunately at this time Salesforce accounts using Custom Domains aren’t able to connect up to Zapier. We do support My Domains.

Hi @RSMG Salesforce Center!

I can see that you’ve been in touch with the Zapier Support team about this and they recommended the following:

Kindly disable the following settings in Salesforce: https://help.salesforce.com/s/articleView?id=sf.admin_sessions.htm&type=5
 

• Lock sessions to the IP address from which they originated
• Lock sessions to the domain in which they were first used

 
Here is a screenshot of what this looks like: 

When you’ve had an opportunity to give their suggestions a try, it’s best to reply to the thread that you have open with Support as they will be able to look at your Zaps with you. 

Thanks!