We have 2 UMP servers, primary and secondary. When I access these servers via their hostname instead of the load balancer address and go to Control Panel > Users and organizations I can see that the number of users is different between them.
Why the two UMPs do not have the same information? Do we need some extra probe in UMPs to sync both nodes?
The users are stored in the UIM database, there is no need for any additional component to keep the information in sync.
The data can get out of sync and reindexing the search indexes in the UMP should resolve the problem: