In order to unlink two accounts that were linked incorrectly during a Connector Synch, you will need to make one change in Raiser's Edge and one change in Sphere.

In Raiser's Edge

1. Open the incorrectly linked account
2. Go to the Attributes tab
3. In the Attribute for SphereConstituentIdentifer, remove the value under Description
4. Click Save and Close

In Sphere

1. Go to Contacts > Individuals
2. Search for the account that was linked incorrectly
3. Hover over Manage and click Manage Contact
4. Click the Profile tab
5. Click the Custom Fields sub-tab
6. Click Edit
7. Remove the value from the re_system_identifier field
8. Click Save