SAP Knowledge Base Article - Public

3425671 - ISA-147: Error Matching User By Mailboxid - Mailbox Not Defined


Users cannot connect to the Exchange mail server.


SAP Cloud For Customer

Server Side Add-in for Outlook

Reproducing the Issue

  1. End User goes to User Settings View.
  2. They enter username and password.
  3. The error mentioned is returned.


Issue may be caused on Exchange side.


We recommend the client check if the connectivity test finished without any errors -
Since the user connection is without "Autodiscovery", the test should contain the same "manual" option. Values for the required fields should be provided by your Exchange Admin.

After the test is completed, request the client to export the testing result. If the test isn't successful, they need to resolve the issue on the Exchange side, until the test is finished successfully.


Server, Side, Add-in, Plugin, Outlook, SSI, C4C, Sales Cloud, ISA-147 , KBA , LOD-CRM-GW-SCC , Invisible CRM - Smart Cloud Connect Solution , Problem


SAP Cloud for Customer core applications 2311