Running Test-CsDatabase can produce different output for ExpectedVersion and InstalledVersion against one or more backend SQL databases in your Skype for Business Server infrastructure. Depending on the host where this cmdlet is executed, … this can be confusing as the output appears to suggest that no update is available or even required.
To avoid ‘false alarm’ or wrong version information, always ensure that execution of any *-CsDatabase cmdlets[1]- or for that matter any #skype4b commands – are performed on a host with the current patch level and latest cumulative updates (CU) applied.
[1] such as Test-CsDatabase -DatabaseType Monitoring -SqlServerFqdn … -SqiInstance …