We are having slow enumeration with StoreFront 2402 LTSR. Is there a StoreFront sizing recommendation article?

<1000 User -> Cluster with 4vCPU and 8 GB RAM each. AV Exclusions for SF are important. Disable CRL Checking and Netbios over TCP. See StoreFront Tweaks – Carl Stalhood

Are you sure it's StoreFront that is the issue, not your DDCs? In the diagnostics log StoreFront writes entries at each point during the enumeration process including before and after contacting the DDCs. These log entries are tied together by TransactionId. This helps you identify how long each stage in the enumeration is taking.

Remember about recommendation from Citrix: _Citrix recommends a maximum of six servers in a server group. In case of more than six servers, the overhead of synchronizing data outweighs the benefit of the additional servers, and the performance is degraded. StoreFront server group deployments are only supported where links between servers in a server group have latency of less than 40 ms (with subscriptions disabled) or less than 3 ms (with subscriptions enabled). Ideally, all servers in a server group should reside in the same location (data center, availability zone), but server groups can span locations within the same region provided that links between servers in the group meet these latency criteria._