How do I resolve the message "app1/app2: We couldn't authenticate this account"?

Cause

The problem is that a previously stored account can no longer read/write to your software to synchronize your contacts.

General solution

1.  Delete the connection (your contacts remain untouched).

2.  Disconnect the affected account via this page.

3. Create a new connection. The affected account will be able to be reconnected.

Special solutions

• "Microsoft 365" Account: maybe the user has two-factor authentication enabled. This situation is not yet compatible with sync.blue®.