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I'm using both Zapier and Workato to run some API integrations into my Salesforce org, I appear to be getting 401: INVALID_SESSION_ID: Session expired or invalid errors on both systems.

Only initial connection and for at least a few minutes the connection works and I can successfully query and push data into Salesforce but shortly after both systems return the 401 error. The user password or grants have not been changed, and I don't think its a Zapier and Workato issue as both platforms are experiencing the same issue.

Could someone explain what could be the cause? I suspect its something in Salesforce. Looking at why a session would be invalidated occurs to be only when the app access has been revoked or the password has been changed. Neither of these actions have been completed however so not sure why this is happening.

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    Did you enable "Lock sessions to IP addresses" in Session Settings? This could cause the problem you're seeing.
    – sfdcfox ♦
    Commented Apr 22, 2020 at 17:46
  • This was the reason why, please turn this into an answer. Thanks
    – Deployment Failure
    Commented Apr 22, 2020 at 23:49

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Some tools that use a pool of IP addresses will have problems staying logged in when using the security feature "Lock sessions to IP Addresses" found in the Session Security Settings in Setup. This can also happen to devices that roam from network to network. This feature should be disabled unless you absolutely need the extra security.

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