Exclaimer Add-in: [domain] is not an Exclaimer Customer

Engineers from Microsoft have been able to identify the root cause of the issue and implement a permanent fix. Exclaimer has continued to monitor the event for any additional reports and can confidently confirm there are no further instances of the error at this time. Additional information will be provided once the RCA from Microsoft has been completed.

If you are experiencing issues with your signatures, please contact our support team for more assistance.

Our Engineering team has been monitoring the system's error rate since a significant drop in the number of failures was recorded at 18:50 GMT on March 3rd.
We are continuing to monitor in the event the error rate increases again and maintain communication with Microsoft as well.

Customers using the Exclaimer Outlook Add-in may experience an error: "[domain] is not an Exclaimer Customer".
Engineers from Exclaimer and Microsoft are currently working to resolve this issue and we will provide updates as we know more.
We appreciate your patience in the meantime.