Searching and matching user objects between 2 forests

Question

I have two forests A (old) and B (new)
I need to compare forest A user objects(~2000) with forest B (~14000) user objects and if they match by any one of the following attributes email, DisplayName or cn ... then, i need to csvde/ldifde the matching objects in a spreadsheet line by line for reporting
purposes.
I know how to manually do it using spreadsheet but i would like to automate/script it for efficiency and accuracy. Any scripting help?
the report should look something like this for all matching objects e.g. email matched in this case, but it could it cn or email also.
domainname dn
cn displayname
email Matched
forestA fin/users
user1 user1 last
n [email protected]
Y
forestB ht/users
user2 user2 last
n [email protected]
Y
thanks
Navgup

Answer 1

Hi Navgup,
Not exactly, however, please refer to the script below, please try to export all the users' information to separate .csv files, and compare this two files with Compare-Object:
get-aduser -filter * -properties * |select displayname, distinguishedname|export-csv d:\oldforest.csv
get-aduser -filter * -properties * |select displayname, distinguishedname|export-csv d:\newforest.csv
$file1 = import-csv -Path "d:\oldforest.csv"
$file2 = import-csv -Path "d:\newforest.csv"
$properties=@("displayname","distinguishedname")
foreach($property in $properties){
Compare-Object $file1 $file2 -property $property -IncludeEqual -PassThru | Where-Object{$_.SideIndicator -eq '=='} | select displayname, distinguishedname
I hope this helps.