SAP Knowledge Base Article - Public

3318440 - ISE-064: Customization downgrade is not allowed


Error "ISE-064: Customization downgrade is not allowed" when trying to Force Synchronizatoin of the Server Side Outlook Integration.


SAP Cloud for Customer

Reproducing the Issue

  1. Go to the Email Integration Workcenter > Groupware Settings View
  2. Go to the Users tab
  3. Can see the Error: ISE-064: Customization downgrade is not allowed.


There are 2 causes for this error:

1) The user's Email ID is provisioned on multiple tenants.

2) Currently TEST and PROD environments are on different versions.


Resolution 1:

Please check if the mailbox of the affected user is used for synchronization with a different tenant.

Resolution 2:

Please Check the versions of the Test and Production Tenants and make sure they are the same.


ISE-064: Customization downgrade is not allowed , KBA , LOD-CRM-GW-SCC , Invisible CRM - Smart Cloud Connect Solution , Problem


SAP Cloud for Customer core applications all versions


ISE-064 Error .png