User Problem

Discrepancies between email address on the Atlassian Account and the provisioning data for external accounts will cause the Atlassian Account to be removed from all the provisioned groups.

Even if they get back in sync later, the Atlassian Account is not automatically added back to the provisioned groups in Atlassian. 

Suggested Solutions 

Two options:

1. Automatically add the account back into provisioning groups once the email on the Atlassian Account and the Provisioning records match.
2. Allow Organisation Administrators to perform a resync (API and UI option) 

Current Workarounds

The accounts must be de-provisioned and reprovisioned from the Identity Provider side to be included in the synced groups.