Error 'your Exchange account is already associated with another Salesforce login' on Outlook Integration

How to Resolve the Exchange Account Already Associated Error

This article explains how to resolve the error that occurs when an Exchange email address is already mapped to a different Salesforce account. A Salesforce administrator must delete the existing mapping so the user can reconnect via the Outlook Integration.
Note: These steps must be performed by a Salesforce administrator. If you do not have administrator access, ask your Salesforce administrator to complete the steps on your behalf.

Log In to the Organization Where Your Email Address Is Mapped and Remove the Mapping

1. Navigate to the Outlook Integration and Sync settings:
   1. In Lightning Experience: Setup | Administration | Email | Outlook Integration and Sync
   2. In Salesforce Classic: Setup | Administer | Outlook Integration and Sync | Settings
2. Click Let users access Salesforce records from Outlook and scroll down to the User Mapping section.
3. Locate your email address under the Exchange Email column.
4. Click the dropdown action at the end of that row and select Delete.

These steps remove the Exchange email address mapping from the other Salesforce account. After deletion, go back to Outlook or OWA (Outlook Web App) and reconnect using the Outlook Integration.