How to validate DistinguishedName strings

By nature, Exchange 2007 is strongly integrated with Active Directory (AD) and as such, it exposes new types to interact with AD. A lot of the user object properties across all the AD forest are made available through the Get-User command-let. 
If you need to pass strings as "DistinguishedName" this function can help you validate them.

 

function Validate-DistinguishedName{
    param([string]$dn)
    [Microsoft.Exchange.Data.Directory.ADObjectId]::IsValidDistinguishedName($dn)
}

 

>> Validate-DistinguishedName "CN=Administrator,CN=Users,DC=homelab,DC=loc"
True

>> Validate-DistinguishedName "CN=Administrator,CN=Users,DC=homelab"
True

>> Validate-DistinguishedName "CN=Administrator,CN=Users"
True

>> Validate-DistinguishedName "Shay@homelab.loc"
False

>> Validate-DistinguishedName "AB=CD,EF= G H"
True