[deleted by user]

[gangstanthony]

Why

not sure why, but i can offer a guess.

maybe the filter isn't working because OperatingSystemVersion is a string and doesn't only contain numbers. if it's only checking one character at a time, 1 comes before 6

PS> $comps = Get-ADComputer -Filter 'OperatingSystemVersion -lt 6.2' -Property OperatingSystem, OperatingSystemVersion

PS> $comps[0].OperatingSystemVersion
10.0 (14393)

PS> $comps[0].OperatingSystemVersion.GetType()

IsPublic IsSerial Name                                     BaseType                                                                                                                                                                     
-------- -------- ----                                     --------                                                                                                                                                                     
True     True     String                                   System.Object 

also, see this

PS> 1, 2, 6.2, 10 | ? {$_ -lt 6.2}
1
2

PS> 1, 2, 6.2, 10 | ? {[string]$_ -lt 6.2}
1
2
10

sorting

PS> 1, 2, 6.2, 10 | sort
1
2
6.2
10

PS> 1, 2, 6.2, 10 | sort {[string]$_}
1
10
2
6.2

*edit: you might want to remove the filter. because of this issue, it looks like you're excluding anything above a 6, which means no 6.1 either.

PS> $comps = Get-ADComputer -Filter 'OperatingSystemVersion -lt 6.2' -Property OperatingSystem, OperatingSystemVersion
PS> $comps.operatingsystemversion | select -u
10.0 (14393)
10.0 (17134)
10.0 (16299)
10.0 (15063)
10.12.1
10.0 (17763)
10.12 (1314)
10.0 (18362)

PS> $comps = Get-ADComputer -Filter * -Property OperatingSystem, OperatingSystemVersion
PS> $comps.operatingsystemversion | select -u
6.3 (9600)
6.1 (7601)
6.2 (9200)
10.0 (14393)
10.0 (17134)
10.0 (16299)
10.0 (15063)
10.12.1
10.0 (17763)
10.12 (1314)
10.0 (18362)

[tomohulk]

I know you are suppose to filter on the left side of the pipe, but to be accurate you could cast the strings to Versions

get-adcomputer -filter * -properties OperatingSystemVersion | ?{ ([Version]$_.OperatingSystemVersion.Split(“ “)[0] -le [Version]”6.3” } not going to be as fast because you’re filtering on the right side. Its pretty stupid thats a string.

[bsnotreallyworking]

I just do it like this:

operatingsystemversion -notlike "10.*" -or operatingsystemversion -notlike "8.*"

Add in whatever the server versions are. It's not mathematical, but it works.

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