The error message breaks down like this:

OLE exception from "Provider":
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Means that the error came from your provider (Active Directory in this case).

One or more errors occurred during processing of command
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Is the error that was returned by Active Directory.

Win32::OLE(0.1702) error 0x80040e14
    in METHOD/PROPERTYGET "Execute" at sdomain.pl line 11
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Means that Active directory generated the error when Perl called "Execute" on line 11.


The command you're trying to execute on line 11 is

LDAP://dc=corp,dc=example,dc=edu;(&(objectclass=user)(objectcategory=P
+erson));name,mailNickname,extensionAttribute1;Subtree
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The error message from Active Directory isn't very helpful in this case. You need to change

my $strBase    =  "LDAP://dc=corp,dc=example,dc=edu;";
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to

my $strBase    =  "<LDAP://dc=corp,dc=example,dc=edu>;";
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