Einstein Activity Capture (EAC) Connected Account Randomly Disconnecting in Salesforce Sales Cloud

This article explains how to stop an Einstein Activity Capture (EAC) connected account from repeatedly disconnecting and requiring re-authentication, and how to identify the Microsoft-side setting typically causing it.

Workaround: Reconnect the Email Account

Impacted users can manually reconnect their email account in Salesforce. Go to Personal Settings, click Email, and then click Connected Accounts.

Permanent Resolution: Review Microsoft Entra Policies

If disconnections continue, take these steps:

1. Have your Microsoft 365 or Entra administrator audit active Conditional Access policies applied to the Einstein Activity Capture enterprise app.
2. Check Sign-in Frequency and Session Control rules to confirm they are not revoking or blocking background OAuth token refreshes.