This license has an upper limit to active accounts in the Active Directories being analyzed.
An active account is an enabled user or computer account which has logged in during the last 90 days.
If you're unsure how many active accounts you have, you can use this PowerShell code to get it:
Get-ADObject -LDAPFilter
"(&(|(objectClass=computer)(objectClass=person))(!userAccountControl:1.2.840.113556.1.4.803:=2))" -Property
LastLogonTimeStamp | Where-object {[datetime]::FromFileTime($_.LastLogonTimeStamp) -gt (Get-Date).AddDays(-90)} |
Measure | Select Count
The account limit is the total sum of all accounts being analyzed across all domains, so if you want to analyze a foreign trusted domain this also needs to be licensed.
Adalanche allows you to run with a reasonable overcommitment on the account limit, but will issue a warning stating that you're voilating the license.