When we try to delete a hosted organization user we receive the following error:
Input string was not in a correct format

Does somebody have this issue too?

We already did the following to investigate the problem:

  • Moved the enterprise service and portal to a new 2016 server
  • Installed a new server service on our second domain controller, changed the virtual server (delete the old domain controller) and moved the hosted organizations to the new server
  • Changed the log level in web.config on the solidcp server to 4. In none of the log files (eventvwr application log and solidcp log) appears an error.
  • Created a new customer with hosted organization. The same error appears when we try to delete a user.

When we try to delete a exchange mailbox everything is working correctly.

I hope somebody can help us with this issue.